HAZUS simulation: 1882 Earthquake, Rocky Mountain National Park Epicenter M 6.6, CEUS Attenuation

Earthquake Reference Collection

Staff at the CGS assembled an Earthquake Reference Collection with more than 500 references that pertain broadly to seismicity, structural geology, faulting, and tectonics across the state of Colorado. Many of these references are difficult if not impossible to locate in most libraries.

To access the collection you will need to go to Zotero.org and create a user account. Once you have done this, email us the user name you created, and we will share with you the contents of the ERC library through the Zotero sharing function. Zotero is an open-source platform for authors, academics, students, and the general public to create and share bibliographic collections. The CGS has no relationship with Zotero except as a user of the platform.

This is the most current bibliography of the ERC. You will be able to access pdf downloads of the articles and publications via the Zotero shared library.

Abbott, J.T., 1976, Geologic map of the Big Narrows quadrangle, Larimer County, Colorado: Geologic Quadrangle, scale 1:24,000.

Ake, J., and Butler, D., 1988, Front Range seismicity study: MicroGeophysics Corporation Annual Progress Report.

Ake, J., Chang, P.S., and Martin, R., 1992, Microseismicity induced by fluid injection in the Paradox Valley of southwestern Colorado (Abstract only): Seismological Research Letters, v. 63, no. 1, p. 19–20.

Ake, J.P., and O’Connell, H., 1994, Induced Microseismicity Associated with Deep-well Disposal of Brine at Paradox Valley, Colorado (Abstract only), in 1994 Fall Meeting – Eos, Proceedings of the American Geophysical Union Abstracts.:

Ake, J., Ostenaa, D., Mahrer, K., Sneddon, C., and Block, L., 2002, Seismotectonic evaluation and probabilistic seismic hazard analysis for Ridgway Dam, Dallas Creek Project, Colorado: U.S. Bureau of Reclamation Seismotectonic Evaluation 2001–4.

Ake, J.P., and Vetter, U., 2000, Probabilistic ground motion evaluation for Horsetooth, Spring Canyon, Soldier Canyon, and Dixon Dams, Colorado-Big Thompson Project, North-Central Colorado: U.S. Bureau of Reclamation Technical Memorandum D8330-2000–006.

Algermissen, S.T., Perkins, D.M., Thenhaus, P.C., Hanson, S.L., and Bender, B.L., 1982, Probabilistic estimates of maximum acceleration and velocity in rock in the contiguous United States: U.S. Geological Survey Report 82–1033.

Algermissen, S.T., Perkins, D.M., Thenhaus, P.C., Hanson, S.L., and Bender, B.L., 1990, Probabilistic earthquake acceleration and velocity maps for the United States and Puerto Rico: Miscellaneous Field Studies Map.

Allen, C.R., 1974, Geological Criteria for Evaluating Seismicity: Geological Society of America Bulletin, v. 86, p. 17.

Allen, C.R., 1986, Reservoir-induced seismicity bibliography: California Institute of Technology.

Alvord, D.C., 1955, Carnotite resources of San Miguel bench, Montrose County, Colorado: U.S. Geological Survey Report 289.

An assessment of seismic monitoring in the United States: requirement for an Advanced National Seismic System, 1999, U.S. Geological Survey Report 1188.

Arestad, J.F., 1977, Resistivity studies in the upper Arkansas Valley and northern San Luis Valley, Colorado: Golden, CO, Colorado School of Mines, 277 p.

Atkinson, C.H., and Ward, D.C., 1967, Project Gasbuggy – Status Report: Journal of Petroleum Technology, p. 1319–1324.

Baars, D.L., and Stevenson, G.M., 1981, Tectonic evolution of the Paradox Basin, Utah & Colorado, in 1981 Field Conference – Geology of the Paradox Basin: Denver, CO, Rocky Mountain Association of Geologists, p. 23–31.

Baecher, G.B., and Keeney, R.L., 1982, Statistical examination of reservoir-induced seismicity: Bulletin of the Seismological Society of America, v. 72, no. 2, p. 553–569.

Baker, A.A., 1935, Geologic structure of southeastern Utah: Bulletin of the American Association of Petroleum Geologists, v. 19, no. 10, p. 1472–1507.

Baltz, E.H., 1965, Stratigraphy and history of Raton Basin and notes on San Luis Basin, Colorado-New Mexico: Bulletin of the American Association of Petroleum Geologists, v. 49, no. 11, p. 2041–2073.

Bardwell, G.E., 1966, Some statistical features of the relationship between Rocky Mountain Arsenal Waste Disposal and frequency of earthquakes: The Mountain Geologist, v. 3, no. 1, p. 37–42.

Battalora, R.J., 1997, Earthquake magnitudes and recurrence intervals in Colorado: Fort Collins, CO, Colorado State University, 212 p.

Beckner, J., Earley, J., Li, L., Hardesty, R., Alsop, T., and Hickman, A., 1996, Preliminary and detailed seismic evaluations for potentially hazardous buildings within the City of Fort Collins: Earthquake Damage Consulting.

Behrendt, J.C., and Bajwa, L.Y., 1974, Bouguer gravity and generalized elevation maps of Colorado- Map 896: Geophysical Investigation Map, scale 1:1,000,000.

Behrendt, J., Popenoe, P., and Mattick, R., 1969, A Geophysical Study of North Park and the Surrounding Ranges, Colorado: Geological Society of America Bulletin, v. 80, no. 8, p. 9.

Bell, H., 1952, Carnotite resources of the Legin Group Area, San Miguel County, Colorado: U.S. Geological Survey Report 145.

Berg, R.R., 1962, Subsurface interpretation of Golden Fault at Soda Lakes, Jefferson County, Colorado (G. E. Murray, Ed.): Bulletin of the American Association of Petroleum Geologists, v. 46, no. 1, p. 704–707.

Bergendahl, M.H., 1963, Geology of the northern part of the Tenmile Range, Summit County, Colorado: U.S. Geological Survey Report 1162D.

Bogolub, K.R., Morgan, M.L., Fitzgerald, F.S., Palkovic, M.J., and Broes, L.D., 2019, Increasing Colorado’s Seismic Network – New Developments by the Colorado Geological Survey, in 2019 SSA Annual Meeting – Central and Eastern North America and Intraplate Regions Worldwide [Poster]: Seattle, WA, Seismological Society of America.

Bohari, F., Mollison, J., Ratcliff, B., Reineck, M., and Schlittenhart, J., 1997, The design of an earthquake public information program for Colorado:

Bollinger, G.A., Adams, M.J., Henrisey, R.F., and Langer, C.J., 1983, The Denver Earthquake Sequence of March-April 1981: Earthquake Notes, v. 54, no. 2, p. 3–12.

Bolyard, D.W., 1997, Late Conozoic history of the northern Colorado Front Range, in Colorado Front Range Guidebook: Denver, CO, Rocky Mountain Association of Geologists, p. 125–134.

Bonilla, M.G., and Buchanan, J.M., 1970, Interim report on worldwide historic surface faulting: U.S. Geological Survey Report 1161.

Bonkoski, M., Carsten, J., Hansuld, B., Hochnadel, J., and Ryman, D., 2000, Seismic restraint of mechanical and electrical systems: Colorado School of Mines, 38 p.

Boos, C.M., and Boos, M.F., 1957, Tectonics of eastern flank and foothills of Front Range, Colorado: Am. Assoc. Petroleum Geologists Bull., v. 41, no. 12, p. 2603–2676.

Bott, J.D.J., and Wong, I.G., 1995a, The 1986 Crested Butte earthquake swarm: a model for contemporary seismogenesis in Colorado: Bulletin of the Seismological Society of America, v. 85, no. 5, p. 1495–1500.

Bott, J.D.J., and Wong, I.G., 1995b, The 1986 Crested Butte swarm and its implications for seismogenesis in Colorado: Bulletin of the Seismological Society of America, v. 85, no. 5, p. 1495–1500.

Bott, J.D., and Wong, I.G., 1996, What’s been happening at the Rocky Mountain Arsenal? (Abstract only):

Bott, J., Wong, I., Ake, J., and Steele-Weir, S., 2000a, Upper crustal velocities and earthquake relocations in the central Front Range, Colorado, from a joint hypocenter-velocity inversion: American Geophysical Union 2000 Fall Meeting, San Francisco, CA.

Bott, J.D., Wong, I.G., Ake, J., and Steele-Weir, S., 2000b, Upper crustal velocities and earthquake relocations in the central Front Range, Colorado, from a joint hypocenter-velocity inversion (Abstract only), in Abstract and presentation notes from the American Geophysical Union Fall Meeting: San Francisco, CA, American Geophysical Union, p. F1197.

Boyer, R.F., 1962, Petrology and structure of the southern Wet Mountains, Colorado: Geological Society of America Bulletin, v. 73, p. 1047–1070.

Braddock, W.A., and Cole, J.C., 1978, Preliminary geologic map of the Greeley 1 degree by 2 degrees Quadrangle, Colorado and Wyoming: Open-File Report.

Braddock, W.A., and Cole, J.C., 1990, Geologic map of Rocky Mountain National Park and vicinity, Colorado: IMAP.

Braddock, W.A., and Connor, J.J., 1988, Geologic map of the Livermore Mountain quadrangle, Larimer County, Colorado: Geologic Quadrangle.

Bradley, W.H., 1936, Geomorphology of the north flank of the Uinta Mountains: Report 185I, 163–199 p.

Brasher, G.K., 1952, Carnotite resources of Outlaw Mesa, Mesa County, Colorado: U.S. Geological Survey Report 163, 118 p.

Bredehoeft, J.D., Raleigh, C.B., and Healy, J.H., 1974, Control of earthquakes at Rangely, Colorado (Abstract only): AAPG Bulletin, v. 58, no. 7, p. 1432.

Bredehoeft, J.D., Wolff, R.G., Keys, W.S., and Shuter, E., 1976, Hydraulic fracturing to determine the regional in situ stress field, Piceance Basin, Colorado: Geological Society Bulletin, v. 87, p. 250–258.

Brennan, W.J., 1969, Structural and surficial geology of the west flank of the Gore Range, Colorado: Boulder, CO, University of Colorado, 121 p.

Brew, D.A., 1954, Exploration for uranium deposits in the Atkinson Mesa area, Montrose County, Colorado: Report 290.

Bridwell, R.J., 1968, Geology of the Kerber Creek area, Saguache County, Colorado: Golden, CO, Colorado School of Mines, 229 p.

Brill Jr., K.G., and Nuttli, O.W., 1983, Seismicity of the Colorado Lineament: Geology, v. 11, no. 1, p. 20–24.

Brown, L.L., and Golombek, M.P., 1997, Tectonic stability of the San Luis Hills, Northern Rio Grande Rift, Colorado: Evidence from paleomagnetic measurements: Geophysical Research Letters, v. 24, no. 4, p. 473–476., doi: 10.1029/97GL00127.

Bruner, B., 2016, Bailey area hit by 2.4 magnitude earthquake: Online, http://www.theflume.com/free_content/article_a398f66a-8ccf-11e6-b056-bb2ab9a11905.html, accessed November 2016.

Bryan, K., 1938, Section 1.- Geology and ground-water conditions of the Rio Grande Depression in Colorado and New Mexico, in Regional Planning, Part VI: The Rio Grande Joint Investigaion in the Upper Rio Grande Basin in Colorado, New Mexico, and Texas 1936-1937: Washington, D.C., U.S. Geological Survey, p. 197–225.

Bryner, L., 1952, Carnotite resources of Club Mesa, Montrose County, Colorado: U.S. Geological Survey Report 147.

Budnitz, R.J., Lysmer, J., Bolt, B.A., Cowart, V., and West, M.W., 1994, Peer review panel final report: seismic hazard study, Rocky Flats Plant, Jefferson County, Colorado: Michael W. West and Associates, Inc.

Buffler, R.T., 1997, The Browns Park Formation and its relationship to the late Tertiary geologic history of the Elkhead region, northwestern Colorado – south central Wyoming: Berkeley, CA, University of California, Berkley, 197 p.

Burroughs, R.L., and McFadden, D.H., 1976, Some hydrogeologic problems in the San Luis Basin, Colorado-New Mexico: Colorado School of Mines Professional Contributions, v. 8, p. 544–549.

Bush, A.L., 1950, Carnotite resources in the Charles T. area and vicinity, San Miguel County, Colorado: U.S. Geological Survey Report 112.

Bush, A.L., Hilpert, L.S., and Trace, R.D., 1950, Carnotite resources of the Georgetown group of claims, San Miguel County, Colorado: U.S. Geological Survey Report 116.

Butler, D., 1990, Seismic hazard estimation at the Two Forks Dam Site near Denver, Colorado, in Geotechnical and Environmental Geophysics, Volume III: Geotechnical: Tulsa, OK, Society of Exploration Geophysics, p. 107–119.

Butler, D., 1992, Front Range seismicity study Annual Progress Report 1992: MicroGeophysics Corporation Annual Progress Report Volume 1.

Butler, D., 1993, Front Range Seismicity Study: Annual Progress Report: MicroGeophysics Corporation.

Butler, D., and Ake, J., 1991, Front Range seismicity study Annual Progress Report 1991: MicroGeophysics Corporation Annual Progress Report.

Butler, D., and Ake, J., 1993, Front Range seismic hazard, in AGU Front Range Meeting, Spring 1993 – AGU Front Range Meeting, Spring 1993: American Geophysical Union.

Butler, D., Ake, J., and Nicholl Jr, J.J., 1988, Seismic hazard analysis in the Front Range of Colorado (Abstract only), in 1988 Centennial Celebration Program – Denver, CO, Geological Society of America, p. A15.

Butler, D.L., Brown, P.L., and Bowman, J.R., 1978, Strontia Springs Project: MicroGeophysics Corporation Seismicity Report.

Butler, D.L., Brown, P.L., and Kumamoto, L.H., 1977, Seismological Investigations of the South Platte River Canyon: Foothills Treatment Plant: MicroGeophysics Corporation Seismological Investigation.

Butler, D., and Fore, M.A., 1993, Front Range seismicity study: MicroGeophysics Corporation Annual Progress Report.

Butler, D., Hornback, V.Q., Parsons, J.P., Wahlstrom, E.E., and Wengler, R., 1983, Geology and seismicity of the Strontia Springs area and adjacent areas, Colorado: Denver Water Department.

Butler, D., and Nicholl Jr, J.J., 1985a, Seismicity of the Conifer Colorado earthquake of November 2, 1981: MicroGeophysics Corporation.

Butler, D., and Nicholl Jr, J.J., 1985b, The January 6, 1979 Divide Colorado earthquake: MicroGeophysics Corporation Preliminary Draft.

Cashion (compiler), W.B., 1973, Geologic and structure map of the Grand Junction Quadrangle, Colorado and Utah- Map I-736: IMAP.

Cater, F.W., 1955, Geologic Map of the Naturita NW quadrangle, Colorado: Geologic Quadrangle, scale 1:24,000.

Cater, F.W., and Craig, L.C., 1970, Geology of the Salt Anticline region in southwestern Colorado, with a section on stratigraphy: U.S. Geological Survey Report 637.

Cater, F.W., Stokes, W.L., and Phoenix, D.A., 1955, Geologic map of the Horse Range Mesa quadrangle, Colorado: Geologic Quadrangle, scale 1:24,000.

Chapin, C.E., 1971, The Rio Grande Rift, Part I: Modifications and Additions, in James, H.L., editor, Guidebook of the San Luis Basin, Colorado: New Mexico Geological Society, p. 191–201.

Chapin, C.E., 1979, Evolution of the Rio Grande Rift – a summary, in Rio Grande Rift: Tectonics and Magmatism: American Geophysical Union.

Chapin, C.E., and Kelley, S.A., 1997, The Rocky Mountain erosion surface in the Front Range of Colorado, in Colorado Front Range Guidebook-1997: Rocky Mountain Association of Geologists, p. 101–114.

Charlie, W.A., Battalora, R.J., Siller, T.J., and Doehring, D.O., 2002, Magnitude recurrence relations for Colorado earthquakes: Earthquake Spectra, v. 18, no. 2, p. 233–250.

Charlie, W., Battalora, R., Siller, T., Doehring, D., and van de Lindt, J.W., 2006, Colorado Earthquakes and Active Faults, in Colorado Geotechnical Seminar – ASCE Colorado Section – 2006 Colorado Geotechnical Seminar: Denver, CO.

Charlie, W.A., Doehring, D.O., and Oaks, S.D., 1993, Earthquake hazard in Colorado -Design Earthquakes-: Colorado State University Open-File Report CEHPR-93-01.

Chesterman, C.W., and Main, F.H., 1947, Reconnaissance investigations for trace elements in Utah, Colorado, Nevada,California,and Oregon – preliminary report: U.S. Geological Survey Trace Elements Investigations Report 24.

Christman, R.A., Heyman, A.M., Dellwig, L.F., and Gott, G.B., 1953, Thorium investigations, 1950-52, Wet Mountains, Colorado: U.S. Geological Survey Report 290, 40 p.

Chronic, J., 1964, Geology of the southern Mosquito Range, Colorado: The Mountain Geologist, v. 1, no. 3, p. 103–113.

Colman, S.M., 1985, Map showing tectonic features of late Cenozoic origin in Colorado: IMAP.

Colman, S.M., Choquette, A.F., Rosholt, J.M., Miller, G.H., and Huntley, D.J., 1986, Dating the upper Cenozoic sediments in Fisher Valley, southeastern Utah (USA).: Geological Society of America Bulletin, v. 97, no. 12, p. 1422–1431.

Colman, S.M., McCalpin, J.P., Ostenaa, D.A., and Kirkham, R.M., 1985, Map showing upper Cenozoic rocks and deposits and Quaternary faults, Rio Grande rift, south-central Colorado-IMAP 1594: IMAP.

Colman, S.M., Osterwald, F.W., Scott, G.R., Algermissen, S.T., Perkins, D.M., Hopper, M.G., and Brockman, S.R., 1981, Review of Dames and Moore Draft Final Report:

Colorado Earthquake Hazards: a map of earthquakes and related hazards in Colorado, 1999, scale 1:1,150,000.

Colorado Geological Survey, 2002, RockTalk V05N2, April 2002 – Earthquakes in Colorado: RockTalk, v. 5, no. 2, p. 12.

Colton, R.B., 1976, Map showing landslide deposits and late Tertiary and Quaternary faulting in the Ft. Garland-San Luis area, Colorado-New Mexico: Open-File Report.

Condon, S., 2017, Marble area all shook up, but undamaged, by 11 small earthquakes Jan. 19 and 20: Aspen Times.

Corbett, M.K., 1966, The Geology and Structure of the Mt. Richthofen-Iron Mt. Region, North Central Colorado: The Mountain Geologist, v. 3, no. 1.

Cordell, L., 1978, Regional geophysical setting of the Rio Grande Rift: Geological Society of America Bulletin, v. 89, p. 1073–1090.

Cranswick, E., 1988, Microearthquakes recorded by a micro array at a “Hard Rock” site near Crested Butte, Colorado (Abstract only): Eos, v. 69, no. 18., doi: 10.1029/88EO00160.

Crompton, J.S., 1976, An active seismic reconnaissance survey of the Mount Princeton area Chaffee County, Colorado: Golden, CO, Colorado School of Mines, 66 p.

Crone, A.J., and Machette, M.N., 1995a, Holocene movement on the Cheraw Fault, SE Colorado: another late Quaternary fault in the stable continental interior (Abstract only), in American Geophysical Union 1995 Fall Meeting – American Geophysical Union, p. F362.

Crone, A.J., and Machette, M.N., 1995b, Investigations of Quaternary faulting in the stable interior of the west-central United States, in 1995 Fall Meeting: Denver, CO, American Geophysical Union, p. 9.

Crone, A.J., Machette, M.N., Bradley, L.-A., and Mahan, S.A., 1997, Late Quaternary surface faulting on the Cheraw Fault, southeastern Colorado: U.S. Geological Survey Report 2591.

Crone, A.J., Machette, M.N., Bradley, L.-A., and Mahan, S., 2006, Data Related to Late Quaternary Surface Faulting on the Sangre de Cristo Fault, Rito Seco Site, Costilla County, Colorado- Map-2955: Scientific Investigations Map.

de la Cruz, R.V., and Raleigh, C.B., 1972, Absolute Stress Measurements at the Rangely Anticline, Northwestern Colorado: International Journal of Rock Mechanics and Mining Sciences, v. 9, p. 625–634.

Curtis, B.F. (Ed.), 1973, Cenozoic History of the Southern Rocky Mountains: Memoir, Geological Society of America, Memoir, 288 p.

Cypser, D.A., and Davis, S.D., 1994, The state of corporate knowledge on injection induced earthquakes, an informal survey (Abstract only), in AGU 1994 Fall Meeting – AGU 1994 Fall Meeting: San Francisco, CA, American Geophysical Union.

D. H. Knepper, 1976, Late Cenozoic Structure of the Rio Grande Rift Zone, Central Colorado: Colorado School of Mines Professional Contributions, v. 8, p. 421–430.

Dames and Moore, 1981, Geologic and Seismologic Investigations for Rocky Flats Plant for U.S. Department of Energy: Dames & Moore Geologic and Seismologic Investigations 10805-041–14.

Darrow, A.C., and Krusi, A.P., 1982, Investigations of the activity of the Golden Fault, Colorado (Abstract only), in 35th Annual Meeting Rocky Mountain Section – Bozeman, MT, Geological Society of America Abstracts with Programs, p. 308.

Davis, T.L., 1974, Seismic investigation of late Cretaceous faulting along the east flank of the central Front Range, Colorado: Golden, CO, Colorado School of Mines, 80 p.

Davis, S.D., and Frohlich, C., 1993, Did (or will) fluid injection cause earthquakes? – Criteria for a rational assessment: Seismological Research Letters, v. 64, no. 3–4, p. 207–224.

Davis, T.L., and Stoughton, D., 1979, Interpretation of seismic reflection data from the northern San Luis Valley, south-central Colorado, in Rio Grande Rift: Tectonics and Magmatism: Washington, D.C., American Geophysical Union, p. 185–194.

Davis, T.L., and Weimer, R.J., 1976, Late Cretaceous Growth Faulting, Denver Basin, Colorado: Colorado School of Mines Professional Contributions, v. 8, p. 280–300.

Dee, S.E., 1994, A review of return periods and magnitudes of earthquakes in the denver metropolitan area:

Dickson, P.A., 1988, Seismic hazard investigations in central Front Range, CO (Abstract only), in 1988 Centennial Celebration Program – Denver, CO, Geological Society of America, p. A15.

Drake, A.A., 1955, Geology of the Wood and East Calhoun mines, Central City District, Gilpin County, Colorado: Trace Elements Investigations Report 175.

Dueker, K., Yuan, H., and Zurek, B., 2001, Thick-structured Proterozoic lithosphere of the Rocky Mountain region: GSA Today, v. 11, no. 12, p. 4–9.

Dyni, J.R., 1968, Geologic map of the Elk Springs quadrangle, Moffatt County, Colorado: Geologic Quadrangle, scale 1:62,500.

Earthquake history of Colorado, in Fall 1993 AGU Meeting – Earthquake History of Colorado: San Francisco, CA, National Earthquake Information Center.

Eaton, G.P., 1986, A tectonic redefinition of the Southern Rocky Mountains: Tectonophysics, v. 132, p. 163–193.

Ebel, J., Lazarewicz, A.R., and Kafka, A., 1998, Investigating seismotectonics in the eastern United States using a geographic information system: U.S. Nuclear Regulatory Commission, 117 p., doi: 10.2172/576078.

Eckert, A.D., 1982, The geology and seismology of the Dudley Gulch Graben and related faults, Piceance Creek Basin, northwestern Colorado: Boulder, CO, University of Colorado, 174 p.

Eggler, D.H., 1968, Virginia Dale Precambrian ring dike complex, Colorado-Wyoming: Geological Society Bulletin, v. 79, p. 1545–1564.

Eldredge, S.N., 1996, Homebuyer’s guide to earthquake hazards in Utah: Public Information Series, Salt Lake City, UT, Utah Geological Survey, Public Information Series, 29 p.

Elevenmile fault profile locations.

Elston, D.P., and Landis, E.R., 1960, Pre-Cutler unconformities and early growth of the Paradox Valley and Gypsum Valley salt anticlines, Colorado: Short Papers in the Geologic Sciences, v. 400- B, p. B261–B265.

Emerson, J.F., 1943a, Field survey of Huerfano Park District, Raton Basin area, Colorado: Huerfano Park District Raton Basin Area Areal Geology, scale 1:2,000.

Emerson, J.F., 1943b, Summary of investigation of vanadium and uranium occurrence in Huerfano Park Dist. Raton Basin area Huirfano and Costilla countires, Colo.: Union Mines Development Corporation.

Energy resources map of Colorado, 1977,: IMAP, scale 1:500,000.

Epis, R.C., and Chapin, C.E., 1968, Geologic history of the Thirtynine Mile Volcanic Field, central Colorado: Colorado School of Mines Quarterly, v. 63, no. 3, p. 51–85.

Epis, R.C., Scott, G.R., Taylor, R.B., and Chapin, C.E., 1976a, Cenozoic volcanic, tectonic, and geomorphic features of central Colorado: Colorado School of Mines Professional Contributions, v. 8, p. 323–338.

Epis, R.C., Scott, G.R., Taylor, R.B., and Chapin, C.E., 1980, Summary of Cenozoic geomorphic, volcanic, and tectonic features of central Colorado and adjoining areas, in Colorado Geology: Rocky Mountain Association of Geologists, p. 135–156.

Epis, R.C., Scott, G.R., Taylor, R.B., and Sharp, W.N., 1976b, Petrologic, tectonic, and geomorphic features of central Colorado: Colorado School of Mines Professional Contributions, v. 8, p. 301–322.

Evanoff, E., and Chapin, C.E., 1994, Composite nature of the “Late Eocene Surface” of the Front Range and adjacent regions, Colorado and Wyoming (Abstract only), in Geological Society of America Abstracts with Programs: Geological Society of America GSA Abstracts with Programs, p. 12.

Evans, D.M., 1966, Man-made earthquakes in Denver: Geotimes, v. 10, no. 9, p. 11–18.

Evans, D.M., 1967, Man-made earthquakes- a progress report: Geotimes, v. 12, no. 6, p. 19–21.

Evans, D.M., 1969, Fluid pressure and earthquakes (Abstract only): Eos, Transactions, American Geophysical Union, v. 50, no. 5, p. 387–388.

Evans, D.M., 1970, The Denver Area Earthquakes and the Rocky Mountain Arsenal Disposal Well, in WM. Mansfield Adams, editor, Engineering Geology Case Histories Number 8- Engineering Seismology: The Works of Man: Geological Society of America GSA Engineering Geology Case Histories, p. 25–32.

Fassett, J.W., 1974, Seismicity near the Chatfield Dam, Denver, Colorado: Golden, CO, Colorado School of Mines, 127 p.

Final environmental statement: proposed Foothills project, 1977, U.S. Bureau of Land Management Environmental Impact Statement Volume 1.

Fischer, R.P., 1960, Vanadium-uranium deposits of the Rifle Creek area, Garfield County, Colorado: U.S. Geological Survey Vanadium and uranium, Colorado 1101, 52 p.

Frankel, A.D., Mueller, C.S., Barnhard, T.P., Perkins, D.M., Leyendecker, E.V., Dickman, N., Hanson, S.L., and Hopper, M.G., 1996, National Seismic-Hazard Maps: Documentation June 1996: U.S. Geological Survey Report 96–532, 119 p.

Friedman, J.D., Case, J.E., and Simpson, S.L., 1994, Tectonic trends of the northern part of the Paradox Basin, southeastern Utah and southwestern Colorado, as derived from Landsat multispectral scanner imaging and geophysical and geologic mapping: U.S. Geological Survey Report 2000C.

Front Range seismicity study, 1992, MicroGeophysics Corporation Annual Progress Report Volume 2.

Ganz, S., and Traynor, T., 1998, Earthquake insurance: public policy perspectives: San Francisco, CA, Western States Seismic Policy Council, 28 p.

Geissman, J.W., Snee, L.W., Graaskamp, G.W., Carten, R.B., and Geraghty, E.P., 1992, Deformation and age of the Red Mountain intrusive system (Urad-Henderson molybdenum deposits), Colorado: Evidence from paleomagnetic and 40Ar/39Ar data: GSA Bulletin, v. 104, no. 8, p. 1031–1047.

Geologic and mineral and water resources investigations in western Colorado using ERTS-1 data: final report, 1974, Colorado School of Mines Remote Sensing Report 75–1.

Geologic characterization report for the Paradox Basin study region Utah study areas, 1982, Woodward-Clyde Consultants Geologic Characterization Report ONWI-290, 172 p.

Geologic characterization report for the Paradox Basin study region, Utah study areas: Volume 1 regional overview, 1982, Woodward-Clyde Consultants ONWI-290.

Geologic history of the Colorado River, 1969, The Colorado River Region and John Wesley Powell, v. 669, p. 59–130.

Geologic investigations of radioactive deposits–Semiannual progress report, June 1 to November 30, 1954, 1954, U.S. Geological Survey Report 491.

Geologic map of the Morrison quadrangle, Jefferson County, Colorado, 1972,: U.S. Geological Survey Miscellaneous Investigations Map, scale 1:24,000.

Geotechnical Advisory Committee, 1984a, Geologic seismotectonic investigations, east-central Front Range, Colorado–Part I: Denver Water Department Interim Report.

Geotechnical Advisory Committee, 1984b, Geologic seismotectonic investigations, east-central Front Range, Colorado–Part II: Denver Water Department Interim Report.

Geotechnical Advisory Committee, 1985a, Geologic seismotectonic investigations, east-central Front Range, Colorado–Part I: General Statement; A: Interim Report 2.

Geotechnical Advisory Committee, 1985b, Geologic seismotectonic investigations, east-central Front Range, Colorado–Part II: B: Interim Report 2.

Geotechnical Advisory Committee, 1985c, Geologic seismotectonic investigations, east-central Front Range, Colorado–Part III: C-E: Interim Report 2.

Geotechnical Advisory Committee, 1985d, Geologic seismotectonic investigations, east-central Front Range, Colorado–Part IV: Interim Report 2.

Geotechnical Advisory Committee, 1985e, Geologic seismotectonic investigations, central Front Range, Colorado–Part I: Denver Water Department Interim Report 3.

Geotechnical Advisory Committee, 1985f, Geologic seismotectonic investigations, central Front Range, Colorado–Part II: Denver Water Department Interim Report 3.

Geotechnical Advisory Committee, 1985g, Geologic seismotectonic investigations, central Front Range, Colorado–Part IV: Denver Water Department Interim Report 3.

Geotechnical Advisory Committee, 1985h, Geologic seismotectonic investigations, central Front Range, Colorado–Part V: Denver Water Department Interim Report 3.

Geotechnical Advisory Committee, 1985i, Geologic seismotectonic investigations, central Front Range, Colorado–Part VI: Denver Water Department Interim Report 3.

Geotechnical Advisory Committee, 1986, Geologic seismotectonic investigations, central Front Range, Colorado-Summary Report: Denver Water Department Summary Report.

Gibbs, J.F., Healy, J.H., Raleigh, C.B., and Coakley, J., 1973, Seismicity in the Rangely, Colorado area: 1962-1970: Bulletin of the Seismological Society of America, v. 63, no. 5, p. 1557–1570.

Giegengack Jr., R.F., 1962, Recent volcanism near Dotsero, Colorado: Boulder, CO, University of Colorado, 53 p.

Godchaux, J.D., 2000, A microseismic survey of the northern Colorado Front Range: San Antonio, TX, Trinity University, 32 p.

Goetz, P., 2017a, Earthquake felt in Cotopaxi: The Mountain Mail.

Goetz, P., 2017b, Quake felt in Paxi: The Mountain Mail.

Goter, S.K., 1991, Earthquakes in Utah, 1884-1989: Open-File Report, scale 1:500,000.

Goter, S.K., Presgrave, B.W., Henrisey, R.F., and Langer, C.J., 1988, The Carbondale, Colorado, earthquake swarm of April – May, 1984: U.S. Geological Survey Report 88–417.

Gridley, J.M., Adams, D.C., and Keller, G.R., 1991, A structural interpretation of the upper Arkansas Graben area, Colorado from gravity data (Abstract only), in 44th Annual Rocky Mountain Section, 25th Annual South-Central Section – 44th Annual Rocky Mountain Section, 25th Annual South-Central Section: Albuquerque, New Mexico, Geological Society of America Abstracts with Programs, p. 27.

Grier, T., and Sibley, F., 1997, The State of Colorado Five-Year Earthquake and Related Hazards Plan: FFY 1997 – FFY 2001:

Gries, J.C., 1995, Neogene tectonic modification of Laramide thrust faults, northern Sangre de Cristo Mountains, Colorado (Abstract only): AAPG Bulletin, v. 79, no. 6, p. 918.

Guillotte, G.B., 1944a, Report of preliminary field reconnaissance of reported SOM occurrences in eastern Colorado: Union Mines Development Corporation RM00-49.

Guillotte, G.B., 1944b, Report on field reconnaissance survey of S-37 deposits in Gilpin County, Colorado, United States: Union Mines Development Corporation RM00-48, 1–21 p.

Guillotte, G.B., 1944c, S-37 occurrences in the Grover Pegmatite Mine on North Beaver Brook, Clear Creek County, Colorado: Union Mines Development Corporation Rm00-46.

Guillotte, G.B., 1944d, SOM in the hydrocarbons of the Uinta Basin of Utah and Colorado: U.S. Atomic Energy Commission RM00-137, 20 p.

Guillotte, G.B., 1945, The geology and ore deposits of the Brown Derby Pegmatites, Box Canyon Mining District, Gunnison County, Colorado: Union Mines Development Corporation RM00-45.

Gutierrez, F., and Matthews, V., 2002, Tectonic deformation of a Holocene rockglacier in the southern Rocy Mountains (Tenmile Range, Colorado, USA): Estudios recientes (2000-2002) en Geomorfologia, p. 193–203.

Hadley, L.M., 1975, Seismicity of Colorado-vicinity of Cabin Creek pumped-storage hydroelectric plant: Golden, CO, Colorado School of Mines, 163 p.

Hadsell, F.A., 1968, History of Earthquake Activity in Colorado: Colorado School of Mines Quarterly, v. 63, no. 1, p. 57–72.

Hail Jr., W.J., and Smith, M.C., 1997, Geologic map of the southern part of the Piceance Creek basin, northwestern Colorado: IMAP, scale 1:100,000.

Hail, W.J., and Smith, M.C., 1994, Geologic map of the northern part of the Piceance Creek basin, northwestern Colorado: IMAP, scale 1:100,000.

Hansen, W.R., 1971, Geologic map of the Black Canyon of the Gunnison River and vicinity, western Colorado: IMAP, scale 1:31,680.

Hansen, W.R., 1977, Geologic map of the Zenobia Peak quadrangle, Moffat County, Colorado: Geologic Quadrangle, scale 1:24,000.

Hansen, W.R., 1986, History of faulting in the eastern Uinta Mountains, Colorado and Utah, in New Interpretations of Northwest Colorado Geology: Denver, CO, Rocky Mountain Association of Geologists, p. 5–17.

Hansen, W.R., Carrara, P.E., and Rowley, P.D., 1980, Geologic map of the Haystack Rock quadrangle, Moffat County, Colorado: Geologic Quadrangle, scale 1:24,000.

Harms, J.C., 1959, Structural geology of the eastern flank of the southern Front Range, Colorado Pt. 1: Boulder, CO, University of Colorado, 139 p.

Harms, J.C., 1964, Structural history of the southern Front Range: The Mountain Geologist, v. 1, no. 3, p. 93–101.

Harrison, S., 2016, Two earthquake fault lines located near Colorado Springs: KRDO.

Hawley (compiler), J.W., 1978, Guidebook to Rio Grande rift in New Mexico: Report 163.

Hays, W.W., 1980, Procedures for estimating earthquake ground motions: U.S. Geological Survey Professional Paper 1114.

Healy, J.H., 1966, Geophysical and geological investigations relating to earthquakes in the Denver area, Colorado: U.S. Geological Survey Report 66–60.

Healy, J.H., Hamilton, R.M., and Raleigh, C.B., 1970, Earthquakes induced by fluid injection and explosion: Tectonophysics, v. 9, p. 205–214.

Healy, J.H., and Hoover, D.B., 1968, Microearthquakes near the Rocky Mountain Arsenal Well, Denver, Colorado (Abstract only): Geological Society of America Special Paper, v. 115, p. 422.

Healy, J.H., and Jackson, W.H., 1968, Studies of microearthquakes associated with a center of seismicity in the Denver area, Colorado (Abstract only): Geological Society of America Special Paper, v. 101, p. 309–310.

Healy, J.H., Raleigh, C.B., and Coakley, J.M., 1969, Earthquakes near Rangely, Colorado, may be related to fluid injection (Abstract only): Geological Society of America Special Paper, v. 121, p. 1230–1237.

Healy, J.H., Rubey, W.W., Griggs, D.T., and Raleigh, C.B., 1968, The Denver Earthquakes: Science, v. 161, no. 3848, p. 1301–1310., doi: 10.1126/science.161.3848.1301.

Healy, J.H., Rubey, W.W., Griggs, D.T., and Raleigh, C.B., 1971, The Denver Earthquakes, in Man’s Impact on Environment: McGraw-Hill Book Company, p. 428–441.

Heck, N.H., 1928, Earthquake History of the United States: U.S. Coast and Geodetic Survey Special Publication 149.

Hecker, S., 1993, Quaternary tectonics of Utah with emphasis on earthquake-hazard characterization: Utah Geological Survey Bulletin 127, 97–120 p.

Heerschap, L., 2003, Spinney Mountain faults:

Herbster, J.R., 1989, Recommendations of the seismic study committee to the Salt Lake City Board of Education:

Herrmann, R.B., Dewey, J.W., and Park, S.-K., 1980, The Dulce, New Mexico, Earthquake of 23 January 1966: Bulletin of the Seismological Society of America, v. 71, no. 6, p. 2171–2183.

Herrmann, R.B., Park, S.-K., and Wang, C.-Y., 1981, The Denver earthquakes of 1967-1968: Bulletin of the Seismological Society of America, v. 71, no. 3, p. 731–745.

Heyman, O.G., 1983, Distribution and structural geometry of faults and folds along the northwestern Uncompahgre Uplift, western Colorado and eastern Utah, in Averett, W.R., editor, Northern Paradox Basin – Uncompahgre Uplift – Annual Field Trip Guidebook: Grand Junction, CO, Grand Junction Geological Society, p. 45–57.

Hill, J.M., 1945, Unwatering and sampling of the Kirk Mine, Gilpin County, Colorado: Union Mines Development Corporation RM00-47.

Hoffman, J.P., 1975, The seismic history of the Rio Grande Rift: Earthquake Information Bulletin, v. 7, no. 3, p. 8–13.

Hoffman, J.P., and Northrop, S.A., 1977, The Dulce, New Mexico Earthquake, Jan. 23, 1966: Earthquake Notes, v. 48, no. 4., doi: 10.1785/gssrl.48.4.3.

Hollister, J.C., and Weimer, R.J. (Eds.), 1968, Geophysical and Geological Studies of the Relationships Between the Denver Earthquakes and the Rocky Mountain Arsenal Well Part A: Golden, CO, Colorado School of Mines, 160 p.

Holt, H.E., 1961, Geology of the lower Blue River area, Summit and Grand Counties, Colorado: University of Colorado, 233 p.

Hoover, D.B., and Dietrich, J.A., 1969, Seismic activity during the 1968 test pumping at the Rocky Mountain Arsenal disposal well: U.S. Geological Survey Report 613.

Howard, K.A., Aaron, J.M., Brabb, E.E., Brock, M.R., Gower, H.D., Hunt, S.J., Milton, D.J., Muehlberger, W.R., Nakata, J.K., Plafker, G., Prowell, D.C., Wallace, R.E., and Witkind, I.J., 1978, Preliminary map of young faults in the United States as a guide to possible fault activity: Miscellaneous Field Studies Map.

Hsieh, P.A., 1979a, A reservoir analysis of the Denver earthquakes: a case of induced seismicity: Tucson, AZ, University of Arizona, 75 p.

Hsieh, P.A., 1979b, A reservoir analysis of the Denver earthquakes: a case of induced seismicity: Tucson, AZ, University of Arizona, 75 p.

Hsieh, P.A., and Bredehoeft, J.D., 1979, A reservoir analysis of the Denver earthquakes: a case of induced seismicity (Abstract only), in 1979 Annual Meetings – 1979 Annual Meetings (92nd): San Diego, CA, Geological Society of America Abstracts with Programs, p. 447.

Hsieh, P.A., and Bredehoeft, J.D., 1981, A reservoir analysis of the Denver earthquakes: a case of induced seismicity: Journal of Geophysical Research, v. 86, no. B2, p. 903–920.

Hughes, N.D., 1997a, Results of a microearthquake field study of the Front Range of Colorado: Boulder, CO, University of Colorado Boulder, 30 p.

Hughes, N.D., 1997b, Results of a microseismic survey of the Front Range of Colorado: Boulder, CO, University of Colorado Boulder, 5 p.

Hughes, N., Sheehan, A., and Jones, C., 1998, Results of microearthquake field study of Colorado’s Front Range: Seismological Society of America Meeting, Boulder, CO.

Hunt, C.B., 1956, Cenozoic geology of the Colorado Plateau: U.S. Geological Survey Report 279.

Huntley, D., 1979, Cenozoic faulting and sedimentation in northern San Luis Valley, Colorado: Summary: Geological Society of America Bulletin, v. 90, no. 1, p. 8–10.

Hurr, R.T., 1976, Hydrology of a nuclear-processing plant site, Rocky Flats, Jefferson County, Colorado: U.S. Geological Survey Report 76–268.

Idriss, I.M., 1983, Site response and design ground motions: EERI Annual Meeting Seminar, Reno, NV.

Induced seismicity potential in energy technologies, 2013, Washington, D.C., The National Academies Press, 239 p.

Induced seismicity potential in energy technologies- report in brief National Academy of Sciences.

Injection well earthquake relationship- Rocky Mountain Arsenal, Denver, Colorado, 1966, Omaha District Corps of Engineers Report of Investigations.

International Seismological Survey 1918-1963, Kew Observatory, Richmond, Surrey, England, 1963,.

Izett, G.A., 1974, Geologic map of the Trail Mountain quadrangle, Grand County, Colorado: Geologic Quadrangle, scale 1:24,000.

Jacob, A.F., 1985, Thrusting, Petroleum Seeps, and Seismic Exploration Front Range South of Denver, Colorado, in Macke, D.L., and Maughan, E.K., editors, Rocky Mountain Section Field Trip Guide, 1985: American Association of Petroleum Geologists, p. 77–96.

Jirak, G.T., 1983, Seismic analysis of Horse Creek Dam, Hudson, Colorado (Abstract only): Fort Collins, CO, Colorado State University.

Johnson, R.B., 1969a, Geologic Map of the Trinidad Quadrangle South Central, Colorado, Map I-558: Miscellaneous Geologic Investigations Map I-558, scale 1:24,000.

Johnson, R.B., 1969b, Geologic map of the Trinidad Quadrangle, south-central Colorado: IMAP, scale 1:250,000.

Johnson, E., 2001, Land use laws–is Colorado on top of the rock pile?

Johnston, A.C., and Kanter, L.R., 1990, Earthquakes in stable continental crust: Scientific American, v. 262, no. 3, p. 68–75.

Jones, C.H., Unruh, J.R., and Sonder, L.J., 1996, The role of graviational potential energy in active deformation in the southwestern United States: Nature, v. 381, no. 6577, p. 37–41.

Keller, G.R., 1976, Reconnaissance microearthquake survey of the San Luis Valley, southern Colorado: Bulletin of the Seismological Society of America, v. 66, no. 3, p. 345–347.

Keller, G.R., Karlstrom, K.E., and Farmer, G.L., 1999, Tectonic evolution in the Rocky Mountain Region: 4-D imaging of the continental lithosphere: Eos, Transactions, American Geophysical Union, v. 80, no. 42, p. 493, 495, 498.

Kelley, V.C., 1955a, Regional tectonics of the Colorado Plateau and its relationship to the origin and distribution of uranium: University of New Mexico Publications in Geology, Alburquerque, NM, University of New Mexico Press, University of New Mexico Publications in Geology, 120 p.

Kelley, V.C., 1955b, Tectonics of the four corners region, in Geology of Parts of Paradox, Black Mesa & San Juan Basins: Four Corners Geological Survey Four Corners Field Conference, p. 108–117.

Kelley, V.C., 1955c, Monoclines of the Colorado Plateau: Bulletin of the Geological Society of America, v. 66, p. 789–804.

Kelley, S.A., Chapin, C.E., and Corrigan, J., 1992, Late Mesozoic to Cenozoic cooling histories of the flanks of the northern and central Rio Grande rift, Colorado and New Mexico: New Mexico Bureau of Mines and Mineral Resources Bulletin 145.

Kellogg, K.S., 1996, Neogene basins of the northern Rio Grande Rift – asymmetry inherited from vergence of Laramide structures (Abstract only), in 1996 Annual Meeting – Volcanism, Tectonism, and Sedimentation in the Rio Grande Rift and its Margins in New Mexico and Colorado: Denver, CO, Geological Society of America Abstracts with Programs, p. A-517.

Kellogg, K.S., 1999, Neogene basins of the northern Rio Grande rift: partitioning and asymmetry inherited from Laramide and older uplifts: Tectonophysics, v. 305, p. 141–152.

King, R.U., 1956a, Reconnaissance investigations for uranium in the Colorado Front Range and adjacent areas, 1947-1951: U.S. Geological Survey Report 59.

King, R.U., 1956b, Reconnaissance investigations for uranium in the Colorado Front Range and adjacent areas, 1947-1951–Figures 1&14: Report 59.

King, V.M., Block, L.V., Yeck, W.L., Wood, C.K., and Derouin, S.A., 2014, Geological structure of the Paradox Valley Region, Colorado, and relationship to seismicity induced by deep well injection: Journal of Geophysical Research Solid Earth, v. 119, p. 4955–4978., doi: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2013JB010651.

Kirkham, R.M., 1977, Quaternary movements on the Golden fault, Colorado: Geology, v. 5, p. 689–692.

Kirkham, R.M., 2003, Williams Fork Valley Graben, Colorado: The Northernmost Documented Late Quaternary Structure in the Rio Grande Rift System: Rocky Mountain – 55th Annual Meeting, Fort Lewis College, CO.

Kirkham, R.M., and Rogers, W.P., 1985, Bulletin 46 – Colorado Earthquake Data and Interpretations 1867-1985: Colorado Geological Survey, Department of Natural Resources Earthquake B-46.

Kirkham, R.M., and Rogers, W.P., 1988, The November 7, 1882 Colorado earthquake and its significance to seismic hazard estimation (Abstract only), in 1988 Centennial Celebration Program – Denver, CO, Geological Society of America, p. A15.

Kirkham, R.M., Rogers, W.P., Powell, L., Morgan, M.L., Matthews, V., and Pattyn, G.R., 2004, Bulletin 52B – Earthquake and Late Cenezoic Fault and Fold Map Server: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources Earthquake B-52B.

Kirkham, R.M., and Streufert, R.K., 1996, Neogene deformation in the Glenwood Springs-Carbondale-Gypsum area, Colorado: a progress report (Abstract only), in 1996 Annual Meeting – Volcanism, Tectonism, and Sedimentation in the Rio Grande Rift and its Margins in New Mexico and Colorado: Denver, CO, Geological Society of America Abstracts with Programs, p. A-517.

Kirkham, R.M., and Streufert, R.K., 1998, Recognition of active but “non-seismogenic” salt-related deformation within an extensional environment, west-central Colorado: Miscellaneous Publication, v. 98, no. 2.

Kirkham, R.M., Streufert, R.K., Budahn, J.R., Kunk, M.J., and Perry, W.J., 2001, Late Cenozoic regional collapse due to evaporite flow and Dissolution in the Carbondale Collapse Center, West-Central Colorado: Mountain Geologist, v. 38, no. 4, p. 193–210.

Kirkham, R.M., Streufert, R.K., Scott, R.B., Lidke, D.J., Bryant, B., Perry, Jr., W.J., Kunk, M.J., Driver, N.E., and Bauch, N.J., 1997, Active salt dissolution and resulting geologic collapse in the Glenwood Springs region of west-central Colorado (Abstract only), in 1997 Annual Meeting – Structural Geology III: Brittle Structures: Salt Lake City, UT, Geological Society of America Abstracts with Programs, p. A-416.

Kirkham, R.M., and Widmann, B., 2008, MS-36 Geologic Map of the Carbondale Quadrangle, Garfield County, Colorado: Map Series, scale 1:24,000.

Kluth, C.F., 1991, Inversion and reinversion of the Sangre de Cristo-Rio Grande Rift area, southern Colorado and northern New Mexico (Abstract only): Geological Society of America Abstracts with Programs, v. 23, p. 39.

Kluth, C.F., and Nelson, S.N., 1988a, Age of the Dawson Arkose, southwestern Air Force Academy, Colorado, and implications for the uplift history of the Front Range: Mountain Geologist, v. 25, no. 1, p. 29–35.

Kluth, C.F., and Nelson, S.N., 1988b, Age of the Dawson Arkose, Southwestern Air Force Academy, Colorado, and Implications for the Uplift History of the Front Range: The Mountain Geologist, v. 25, no. 1, p. 29–35.

Knepper, D.H., 1974, Tectonic Analysis of the Rio Grande Rift Zone Central Colorado: Golden, CO, Colorado School of Mines, 252 p.

Knepper Jr., D.H., 1974, Tectonic analysis of the Rio Grande Rift Zone central Colorado: Golden, CO, Colorado School of Mines, 252 p.

Knepper, D.H., and Marrs, R.W., 1971, Geological Development of the Bonanza-San Luis Valley-Sangre de Cristo Range area, South-Central Colorado, in Twenty-second Field Conference – Guidebook of the San Luis Basin, Colorado: New Mexico Geological Society.

Krusi, A.P., and Darrow, A.C., 1982, Investigations of the activity of the Golden fault, Colorado (Abstract only): Geological Society of America Abstracts with Programs, v. 16, no. 6, p. 308.

Kunk, M.J., Kirkham, R.M., Streufert, R.K., Scott, R.B., Lidke, D.K., Bryant, B., and Perry, W.J., 1997, Preliminary constraints on the timing of salt tectonism and geologic collapse in the carbondale and eagle collapse centers, west-central Colorado (Abstract only), in 1997 Annual Meeting – Structural Geology III: Brittle Structures: Salt Lake City, UT, Geological Society of America, p. A-416.

L. Bernreuter, D., Boissonnade, A., and M. Short, C., 2017, Investigation of techniques for the development of seismic design basis using the probabilistic seismic hazard analysis: U.S. Nuclear Regulatory Commission, 168 p., doi: 10.2172/589212.

Lee, K., and Weimer, R.J., 1975, Geologic interpretation of Skylab photographs: Colorado School of Mines Remote Sensing Report 75–6.

Leonard, E.M., and Langford, R.P., 1994, Post-Laramide deformation along the eastern margin of the Colorado Front Range – A case against significant faulting: The Mountain Geologist, v. 31, no. 2, p. 45–52.

Lerner-Lam, A.L., Sheehan, A., Grand, S., Humphreys, E., Dueker, K., Hessler, E., Guo, H., Lee, D.-K., and Savage, M., 1998, Deep structure beneath the Southern Rocky Mountains from the Rocky Mountain Front Broadband Seismic Experiment: Rocky Mountain Geology, v. 33, no. 2, p. 199–216., doi: 10.2113/33.2.199.

Lettis, W., Noller, J., Wong, I., Vetter, U., and LaForge, R., 1996, Colorado River Storage Project- Crystal, Morrow Point, Blue Mesa Dams: U.S. Bureau of Reclamation Seismotectonic Evaluation.

Levandowski, W., Zellman, M., and Briggs, R., 2017, Gravitational body forces focus North American intraplate earthquakes: Nature Communications., doi: 10.1038/ncomms14314.

Leyendecker, E.V., Perkins, D.M., Algermissen, S.T., Thenhaus, P.C., and Hanson, S.L., 1995, USGS spectral response maps and their relationship with seismic design forces in building codes: U.S. Geological Survey Report 95–596.

Limbach, F.W., 1975, The geology of the Buena Vista area, Chaffee County, Colorado: Golden, CO, Colorado School of Mines, 108 p.

Lindsey, D.A., 1998, Laramide structure of the central Sangre de Cristo Mountains and adjacent Raton Basin, southern Colorado: The Mountain Geologist, v. 35, no. 2, p. 55–70.

Lindsey, D.A., Andriessen, P.A.M., and Wardlaw, B.R., 1986, Heating, cooling, and uplift during Tertiary time, northern Sangre de Cristo Range, Colorado: GSA Bulletin, v. 97, no. 9, p. 1133–1143.

Lindsey, D.A., Johnson, B.R., and Andriessen, P.A.M., 1983a, Laramide and Neogene Structure of the Northern Sangre de Christo Range, South-Central Colorado, in Lowell, J.D., editor, Rocky Mountain Foreland Basins and Uplift: Denver, CO, Rocky Mountain Association of Geologists, p. 219–228.

Lindsey, D.A., Johnson, B.R., and Andriessen, P.A.M., 1983b, Laramide and Neogene structure of the northern Sangre de Cristo Range, south-central Colorado, in Rocky Mountain Foreland Basins and Uplifts: Denver, CO, Rocky Mountain Association of Geologists, p. 219–228.

Lipman, P.W., 1974, Geologic map of the Platoro Caldera area, southeastern San Juan Mountains, southwestern Colorado: IMAP, scale 1:48,000.

Lipman, P.W., 1975, Geologic map of the Lower Conejos River Canyon area, southeastern San Juan Mountains, Colorado: IMAP, scale 1:48,000.

Liu, S.C., and De Capua, N.J., 1975, Microzonation of Rocky Mountain states, in U.S. National Conference on Earthquake Engineering – U.S. National Conference on Earthquake Engineering: Ann Arbor, Michigan, p. 128–135.

Lohman, S.W., 1961, Abandonment of Unaweep Canyon, Mesa County, Colorado, by capture of the Colorado and Gunnison Rivers: Short Papers in the Geologic and Hydrologic Sciences, p. B-144-B-146.

Lohman, S.W., 1963, Geologic map of the Grand Junction area, Colorado: IMAP, scale 1:31,680.

Lohman, S.W., 1965, Geology and artesian water supply of the Grand Junction area, Colorado: U.S. Geological Survey Report 451.

Lovering, T.S., and Goddard, E.N., 1950, Geology and ore deposits of the Front Range, Colorado: U.S. Geological Survey Report 223, 319 p.

MacLachlan, J.C., and Kleinkopf, M.D. (Eds.), 1969a, Configuration of the Precambrian Surface of Colorado: The Mountain Geologist, v. 6, no. 4, p. 193–197.

MacLachlan, J.C., and Kleinkopf, M.D. (Eds.), 1969b, Configuration of the Precambrian Surface of Colorado: The Mountain Geologist, v. 6, no. 4, p. 193–197.

Major, M.W., and Romig, P.R., 1969, Secular strain and earthquakes near Denver (Abstract only): Eos, Transactions, American Geophysical Union, v. 50, no. 5, p. 385–387.

Malde, H.E., and Van Horn, R., 1965, Stratigraphy, soils, and geomorphology of the nonglacial quaternary deposits between Boulder and Golden, Colorado, in Guidebook for One-Day Field Conferences Boulder Area, Colorado: International Association for Quaternary Research, p. 40–47.

Malek-Aslani, M.K., 1951, Geology of the Beulah area, Pueblo County, Colorado: Golden, CO, Colorado School of Mines, 227 p.

Manley, K., Scott, G.R., and Wobus, R.A., 1987, Geologic map of the Aztec 1 x 2 degree Quadrangle, northwestern New Mexico and southern Colorado: IMAP, scale 1:250,000.

Man-made earthquakes at Denver and Rangely, Colorado, 1973, v. 5, no. 4, p. 4–9.

Marrs, R., 1973, Application of Remote-Sensing Techniqs to the Geology of the Bonanza Volcanic Center: Golden, CO, Colorado School of Mines, 315 p.

Marshall, G.E., and Stephens, J.R., 1963, Observations of earth-tilt and earthquake correlation, Denver area, Colorado: Earthquake Notes, v. XXXIX, p. 23–36.

Martin, R.A., 1987, Ridgway seismographic network Ridgway Dam and Reservoir Dallas Creek Project, Colorado: U.S. Bureau of Reclamation Seismotectonic Report 87–1.

Martin, R.A., and Spence, W., 1986, Seismicity studies in the eastern Colorado Plateau of southwestern Colorado (Abstract only): Geological Society of America Abstracts with Programs, v. 18, p. 394.

Matthews, V., 1973, A reappraisal of the seismic-risk classification of Colorado: The Mountain Geologist, v. 10, no. 4, p. 111–115.

Matthews, V., and Morgan, M.L., 2004, Neogene faulting in Colorado’s High Plains, in Geological Society of America Abstracts with Programs: Denver, CO, Geological Society of America, p. 117.

Matthews, V., and Morgan, M.L., 2005, Horsts and Grabens of Colorado’s High Plains, in Basin and Range Province Seismic Hazards Summit 2004 – Basin and Range Province Seismic Hazards Summit 2004: Reno-Sparks, NV, Utah Geological Survey Miscellaneous Publications.

Matthews, V., Morgan, M.L., McHarge, J., and Heerschap, L., 2005a, Deterministic HAZUS Damage Estimates for Earthquakes on Selected Faults in Colorado and the Importance of Q (Attenuation Factor), in Geological Society of America Rocky Mountain Section Meeting – Abstracts with Programs: Grand Junction, CO, Geological Society of America, p. 14.

Matthews, V.I., Morgan, M.L., McHarge, J.L., and Heerschap, L., 2005b, Deterministic HAZUS damage estimates for earthquakes on selected faults in Colorado and the importance of Q (attenuation factor) (Abstract only), in Rocky Mountain Section- 57th Annual Meeting – Grand Junction, CO, Geological Society of America Abstracts with Programs, p. 14.

McCalpin, J., 1982, Quaternary Geology and Neotectonics of the West Flank of the Northern Sangre de Cristo Mountains, South-Central Colorado: Colorado School of Mines Quarterly, Golden, CO, Colorado School of Mines, Colorado School of Mines Quarterly, 114 p.

McCalpin, J.P., 1987, Recurrent Quaternary normal faulting at Major Creek, Colorado: An example of youthful tectonism on the eastern boundary of the Rio Grande Rift Zone, in Geological Society of America Centennial Field Guide: Geological Society of America, p. 353–356.

McCalpin, J.P., 1992, Assessment of Faulting at the Proposed New Landfill Site for Rio Grande County, Colorado: Geo-Haz Consultants Faulting Assessment, 15 p.

McCalpin, J.P., 2003, Neotectonics of the Roubideau Creek Fault, Uncompahgre Plateau, Colorado: A Preliminary Assessment: Geo-Haz Consulting Neotectonic, 41 p.

McCann Jr., M.W., 1996, Probalistic seismic hazard assessment for the U.S. Army chemical disposal facility, Pueblo depot activity, Colorado:

McCaplin, J., 1981, Quaternary geolog and neotectonics of the west flank of the northern Sangre de Cristo Mountains, south-central Colorado: Golden, CO, Colorado School of Mines, 327 p.

McElroy, J.R., 1953, Geology of the Derby Creek area, Eagle, Routt, and Garfield Counties, Colorado: University of Colorado, 165 p.

McGuire, R.K., Krusi, A., and Oaks, S.D., 1982, The Colorado earthquake of November 7, 1882: size, epicentral location, intensities, and possible causative fault: The Mountain Geologist, v. 19, no. 1, p. 11–23.

McKay, E.J., 1974, Geologic map of the Lone Mountain quadrangle, Moffat County, Colorado: Geologic Quadrangle, scale 1:62,500.

McKay, E.J., and Bergin, M.J., 1974, Geologic map of the Maybell quadrangle, Moffat County, Colorado: Geologic Quadrangle, scale 1:62,500.

McKeown, F.A., and Thenhaus, P.C., 1983, Northern Rocky Mountains seismic source zones-Summary of workshop convened December 6-7, 1979, in Summary of Workshops Concerning Regional Seismic Source Zones of Parts of the Conterminous United States Convened by the U.S. Geological Survey 1979-1980, Golden, Colorado: U.S. Geological Survey, p. 9–14.

Meremonte, M.E., Lahr, J.C., Frankel, A.D., Dewey, J.W., Crone, A.J., Overturf, D.E., Carver, D.L., and Bice., W.T., 2002, Investigation of an earthquake swarm near Trinidad, Colorado, August-October 2001: Report 2002–73.

Michael West And Associates, Inc, 2001, Evaluation of surface rupture potential & seismic design criteria, Floyd Hill Fault, Clear Creek County High School site, Clear Creek County, Colorado: Michael W. West and Associates, Inc. Geological, Geotechnical, Environmental and EArthquake Engineering 00421.

Miller, M.G., 1999, Active breaching of a geometric segment boundary in the Sawatch Range normal fault, Colorado, USA: Journal of Structural Geology, v. 21, p. 769–776., doi: https://doi.org/10.1016/S0191-8141(99)00078-4.

Minsch, J.H., Stover, C.W., Brewer, L.R., and Baldwin, F.W., 1984, Earthquakes in the United States, July-September 1982: U.S. Geological Survey Report 896C.

Money, N.R., 1977, A seismic investigation of the North Golden area, Jefferson County, Colorado: Golden, CO, Colorado School of Mines, 66 p.

de la Montagne, J., 1953, Late Tertiary normal faults along the east flank of the Park Range, Wyoming and Colorado, in Wyoming Geological Associaiton and University of Wyoming Guidebook: Wyoming Geological Association, p. 103–105.

de la Montagne, J., 1957, Cenozoic Structural and Geomorphic History of Northern North Park and Saratoga Valley, Colorado and Wyoming, in Guide Book to the Geology of North and Middle Parks Basin, Colorado: Denver, CO, Rocky Mountain Association of Geologists.

Morel, J., and Watkins, T., 1997, More data point to potential in S. Colorado sub-basin: Oil & Gas Journal, v. 95, no. 35, p. 78–80.

Morgan, M.L., 2008, Colorado’s earthquakes and known, young faults, scale 1,150,000.

Morgan, M.L., 2015, Colorado’s Potentially Hazardous Faults, in Lund, W.R., editor, Proceedings volume: Basin and Range Province Seismic Hazards Summit III: Salt Lake City, UT, Utah Geological Survey Miscellaneous Publication 15–5.

Morgan, M.L., Matthews, V., and Heerschap, L., 2005a, The Colorado Earthquake Map Server, in Geological Society of America Rocky Mountain Section Meeting – Abstracts with Programs: Grand Junction, CO, Geological Society of America, p. 14.

Morgan, M.L., Matthews, V.I., and Heerschap, L., 2005b, The Colorado earthquake map server (Abstract only), in Rocky Mountain Section – 57th Annual Meeting – Durango, CO, Geological Society of America, p. 14.

Morgan, M.L., Matthews, V., and Heerschap, L., 2012, Colorado Earthquake Map Server, scale Digital.

Morgan, K.S., Morgan, M.L., Widmann, B.L., Pattyn, G.J., Kirkham, R.M., and Phillips, R.C., 2002, Colorado Late Cenozoic Fault and Fold Database and Internet Map Server: User-friendly Technology for Complex Information, in Geological Society of America Annual Meeting – Geological Society of America Abstracts with Programs: Denver, CO, Geological Society of America.

Morgan, M.L., Pattyn, G.R., Matthews, V., and Powell, L., 2004, Colorado Earthquake Database Delivered via Internet Map Server, in GIS in the Rockies – GIS in the Rockies 2004 Abstracts: Denver, CO.

Morgan, K.S., Pattyn, G.J., and Morgan, M.L., 2005c, Colorado Late Cenozoic Fault and Fold Database and Internet Map Server: User-friendly Technology for Complex Information: Environmental and Engineering Geoscience, v. 11, no. 2, p. 155–162., doi: https://doi.org/10.2113/11.2.155.

Munson, R.C., 1968, An investigation of the seismicity in the vicinity of Rangely, Colorado: Golden, CO, Colorado School of Mines, 185 p.

Munson, R.C., 1970, Relationship of effect of waterflooding of the Rangely Oil Field on seismicity, in Engineering Geology Case Histories: Geological Society of America 8, p. 39–49.

Murray, F.N., 1962, The geology of the Grand Hogback Monocline near Meeker, Colorado: University of Colorado, 155 p.

Murray, F.N., 1969, Flexural slip as indicated by faulted lava flows along the Grand Hogback Monocline, Colorado: Journal of Geology, v. 77, no. 3, p. 333–339.

Naeser, C.W., 1979, Fission-track dating and geologic annealing of fission tracks, in Lectures in Isotope Geology: New York, NY, Springer-Verlag, p. 154–169.

Naeser, C.W., Bryant, B., Kunk, M.J., Kellogg, K., Donelick, R.A., and Perry, Jr., W.J., 2002, Tertiary cooling and tectonic history of the White River uplift, Gore Range, and western Front Range, central Colorado: Evidence from fission-track and 39Ar/40 Ar ages, in Kirkham, R.M., Scott, R.B., and Judkins, T.W., editors, Geological Society of America.

Nakai, J.S., Weingarten, M., Sheehan, A.F., Bilek, S.L., and Ge, S., 2017, A Possible Causative Mechanism of Raton Basin, New Mexico and Colorado Earthquakes Using Recent Seismicity Patterns and Pore Pressure Modeling: Earthquakes in the Raton Basin: Journal of Geophysical Research: Solid Earth., doi: 10.1002/2017JB014415.

Nakata, J.K., Wentworth, C.M., and Machette, M.N., 1982, Quaternary fault map of the Basin and Range and Rio Grande Rift provinces, Western United States: Open-File Report, scale 1:2,500,000.

National Earthquake Information Center README, 1977,.

Navarro, R., King, K.W., Brockman, S.R., and Wuollet, G.M., 1974, Rio Blanco seismic effects: U.S. Geological Survey Report 74–1077.

Nelson, S., 2017, Two earthquakes rattle Northwest Colorado last week: Online, http://www2.craigdailypress.com/news/2017/apr/25/earth-says-hello-northwest-colorado-second-minor-e/, accessed April 2017.

Nelson, J.S., and Miller, J.P., 1994, Evidence for the extension of the Rio Grande Rift to the Colorado-Wyoming border (Abstract only), in 46th Annual Rocky Mountain Section – Durango, CO, Geological Society of America Abstracts with Programs, p. 56.

Nelson, A.R., and Shroba, R.R., 1998, Soil relative dating of moraine and outwash-terrace sequences in the northern part of the Upper Arkansas Valley, central Colorado, U.S.A.: Arctic and Alpine Research, v. 30, no. 4, p. 349–361.

Nicholl Jr, J.J., 1983, Strontia Springs Reservoir: September 13, 1982 – March 15, 1983: MicroGeophysics Corporation Seismicity Report.

Nicholson, C., and Wesson, R.L., 1990, Earthquake hazard associated with deep well injection: a report to the U.S. Environmental Protection Agency: U.S. Geological Survey Report 1951.

Noe, D.C., 2010, Anton Escarpment Paleoseismologic Investigation Washington County, Colorado: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources NEHRP Program FY-2007 External Grant Award Number 07HQGR0090.

Noe, D.C., and McCalpin, J.P., 2005, Investigations of possible Quaternary faulting on Colorado’s High Plains – what is the origin of the Anton Scarp? (Abstract only), in Rocky Mountain Section – 57th Annual Meeting – Grand Junction, CO, Geological Society of America, p. 14.

Non-technical explanation of the NEHRP recommended provisions, 1990, 20.

Oaks, S.D., 1984, The November 7, 1882 Colorado earthquake: new findings (Abstract only), in 37th Annual Meeting; Rocky Mountain Section – Durango, CO, Geological Society of America Abstracts with Programs, p. 250.

Oaks, S.D., Hopper, M.G., Sarnhard, L.M., and Algermissen, S.T., 1985, November 7, 1882, Colorado earthquake reinterpreted in light of the October 18, 1984, Wyoming earthquake (Abstract only), in Seismological Society of America, p. 24.

O’Brien, J., and Hyde, B., 1996, Technical Standards for Delineating Alluvial Fan Flooding, in Conference on Geologic Hazards and Engineering Practices in Colorado – Colorado Springs, CO, Colorado Geological Survey, Department of Natural Resources.

O’Brien J. S., Julien P. Y., and Fullerton W. T., 1993, Two‐Dimensional Water Flood and Mudflow Simulation: Journal of Hydraulic Engineering, v. 119, no. 2, p. 244–261., doi: 10.1061/(ASCE)0733-9429(1993)119:2(244).

Olson, J.C., and Hedlund, D.C., 1973, Geologic map of the Gateview quadrangle, Gunnison County, Colorado: Geologic Quadrangle, scale 1:24,000.

Olson, J.C., and Wallace, S.R., 1954, Thorium and rare earth minerals in the Powderhorn district, Gunnison County, Colorado: U.S. Geological Survey Report 353.

O’Neill, J.M., 1981, Geologic map of the Mount Richthofen Quadrangle and the western part of the Fall River Pass Quadrangle, Grand and Jackson counties, Colorado: IMAP, scale 1:24,000.

Ostenaa, D.A., Losh, S.L., and Nelson, A.R., 1980, Recurrent late Quaternary faulting in the upper Arkansas Valley near Buena Vista, Colorado (Abstract only), in Rocky Mountain Section of the Geological Society of America 33rd Annual Meeting – Ogden, Utah, Geological Society of America, p. 300.

Osterwald, F.W., Bennetti Jr., J.B., and Dunrud, C.R., 1973, Preliminary investigation of seismic tremors in the general area of the Leyden coal mine gas-storage reservoir, Colorado: U.S. Geological Survey Report 73–214.

Osterwald, F.W., Dunrud, C.R., Bennetti Jr., J.B., and Maberry, J.O., 1972, Instrumentation studies of earth tremors related to geology and to mining at the Somerset coal mine, Colorado: U.S. Geological Survey Report 762.

Pan, P.-H., 1963, The 1962 earthquakes and microearthquakes near Derby, Colorado: Golden, CO, Colorado School of Mines, 161 p.

Patrick, D.M., 1977, Microearthquake monitoring at Corps of Engineers facilities: Office, Chief of Engineers Technical Report S-77-2.

Pawlak, S.L. Evaluation, design and mitigation of project sites in collapsible soil areas in western Colorado:

Perry, T.W.I., 1989, Tectonic inference and computer simulation in stream longitudinal profile evolution, Unaweep Canyon and vicinity, Colorado and Utah (abstract only), in Annual Meeting – St. Louis, MO Geomorphology, p. A269.

Perry, T.W.I., and Annis, D.R., 1990, Pleistocene history of the Gunnision River in Unaweep Canyon, Colorado, and implications for Colorado Plateau Uplift (Abstract only), in 86th Annual Meeting Cordilleran Section – Tucson, AZ, Geological Society of America Abstracts with Programs, p. 75.

Pierson, C.T., and Singewald, Q.D., 1953, Occurrences of uranium-bearing minerals in the St. Kevin District, Lake County, Colorado: U.S. Geological Survey Trace Elements Investigations Report 234.

Piety, L.A., Nelson, A.R., and Shroba, R.R., 1981, Relative dating of the glacial sequences in the Roaring Fork, lower Lake Creek, and upper Arkansas River Valleys, central Colorado: Friends of the Pleistocene, Rocky Mountain Section, 78 p.

Piety, L.A., and Vetter, U.R., 1992, Ridges Basin damsite, Animas-La Plata Project, southwestern Colorado: U.S. Bureau of Reclamation Seismotectonic Evaluation 92–9, 93 p.

Presgrave, B.W., 1977, Seismicity of Colorado, an estimate of seismic hazard based on instrumental data: Golden, CO, Colorado School of Mines, 175 p.

Presgrave, B.W., 1979, The seismicity of Colorado: an estimate of seismic hazard derived from instrumental data: Golden, CO, Colorado School of Mines, 90 p.

Proceedings of seminar on new developments in earthquake ground motion estimation and implications for engineering design practice, 1994, in ATC-35 Seminar on New Developments in Earthquake Ground Motion Estimation and Implications for Engineering Design Practice – Proceedings of seminar on new developments in earthquake ground motion estimation and implications for engineering design practice: Los Angeles, CA; San Francisco, CA; Seattle, WA; New York, NY; Mephis, TN, U.S. Geological Survey.

Project Rio Blanco, 1971, Kenneth Medearis & Associates Structural Response Studies.

Raleigh, C.B., 1972, Earthquakes and fluid injection: AAPG Memoir, v. 18, p. 273–279.

Raleigh, C.B., Bohn, J., and Healy, J.H., 1970a, Earthquakes and fluid pressures in the Rangely Oil Field, Colorado (Abstract only): Eos, Transactions, American Geophysical Union, v. 51, no. 4, p. 351.

Raleigh, C.B., Bredehoeft, J.D., Healy, J.H., and Bohn, J., 1970b, Earthquakes and waterflooding in the Rangely Oil Field (Abstract only), in 1970 Annual Meetings – Boulder, CO, Geological Society of America Abstracts with Programs, p. 660–661.

Raleigh, C.B., Healy, J.H., and Bohn, J., 1970c, Earthquakes and waterflooding in the Rangely Oil Field (Abstract only), in The Fourty-Second Annual Meeting of the Eastern Section of the Seismological Society of America – Milwaukee, WI, The Seismological Society of America Earthquake Notes, p. 20.

Raleigh, C.B., Healy, J.H., and Bredehoeft, J.D., 1972, Faulting and crustal stress at Rangely, Colorado: Geophysical Monograph, v. 16, p. 275–284.

Raleigh, C.B., Healy, J.H., and Bredehoeft, J.D., 1976, An experiment in earthquake control at Rangely, Colorado: Science, v. 1911, no. 4233, p. 1230–1237.

Raleigh, C.B., Healy, J.H., Bredehoeft, J.D., and Bohn, J.P., 1971, Earthquake control at Rangely, Colorado (Abstract only): Eos, Transactions, American Geophysical Union, v. 52, no. 4, p. 344.

Reheis, M.C., Palmquist, R.C., Agard, S.S., Jaworowski, C., Mears Jr., B., Madole, R.F., Nelson, A.R., and Osborn, G.D., 1991, Quaternary history of some southern and central Rocky Mountain basins, in Quaternary Nonglacial Geology: Conterminous U.S.: Golden, CO, Geological Society of America The Geology of North America, p. 407–440.

Riley, L.B., 1946, SOM occurrences near Garo, Park County, Colorado: Union Mines Development Corporation RM00-438, 1–8 p.

Roach, C.H., 1954, Exploration for uranium deposits in the Spring Creek Mesa area, Montrose County, Colorado: U.S. Geological Survey Report 343.

Rockwood, C.G., 1883, American Earthquakes: The American Journal of Science, v. XXV, no. 145–150, p. 352–361.

Rogers, W.P., 1981, Geologic and seismologic investigations for the Rocky Flats Plant for the U.S. Department of Energy:

Rowley, P.D., Tweto, O., Hansen, W.R., and Carrara, P.E., 1979, Geologic map of the Vernal 1 degree by 2 degrees Quadrangle, Colorado, Utah and Wyoming: Miscellaneous Field Studies Map.

Rummerfield, B.F., Olson, A.P., and Hoover, D.B., 1968, Seismic survey in the region of recent earthquake activity near Denver, Colorado: Geophysics, v. 33, no. 6, p. 915–925.

Sanford, A.R., Olsen, K.H., and Jaksha, L.H., 1979, Seismicity of the Rio Grande Rift, in Rio Grande Rift: Tectonics and Magmatism: Washington, D.C., American Geophysical Union, p. 145–168.

Scopel, L.J., 1964, Pressure injection disposal well, Rocky Mountain Arsenal, Denver, Colorado: The Mountain Geologist, v. 1, no. 1, p. 35–42.

Scott, G.R., 1969a, General and engineering geology of the northern part of Pueblo, Colorado: U.S. Geological Survey Report 1262.

Scott, G.R., 1969b, Geologic map of the Southwest and Southeast Pueblo quadrangles, Colorado: IMAP.

Scott, G.R., 1970, Quaternary faulting and potential earthquakes in east-central Colorado: U.S. Geological Survey Professional Paper 700–C, C11–C18 p.

Scott, G.R., 1973, Reconnaissance geologic map of the Buena Vista Quadrangle, Chaffee and Park counties, Colorado: Miscellaneous Field Studies Map, scale 1:62,500.

Scott, G.R., 1978, Map showing geology, structure, and oil and gas fields in the Sterling 1 x 2 Quadrangle, Colorado, Nebraska, and Kansas: IMAP.

Scott, R.B., Lidke, D.J., Hudson, M.R., Kunk, M.J., Perry, Jr., W.J., and Bryant, B., 1998, Large-scale active collapse in western Colorado: interaction of salt tectonism and dissolution, in Gambling with Groundwater–Physical, Chemical, and Biological Aspects of Aquifer-Stream Relations:, p. 195–205.

Scott, R.B., Lidke, D.J., Hudson, M.R., Perry, Jr., W.J., Bryant, B., Kunk, M.J., Budahn, J.R., and Byers, Jr., F.M., 1999, Active evaporite tectonics and collapse in the Eagle River valley and the southwestern flank of the White River uplift, Colorado: Geological Society of America Field Guide 1.

Scott, G., Nelson, A., and Shroba, R., 1984, Amqua 1984 Field Trip 7 — Quaternary deposits of Upper Arkansas River Valley, Colorado: Boulder, CO, University of Colorado Boulder, 62 p.

Scott, G.R., and Taylor, R.B., 1973, Reconnaissance geologic map of the Beulah Quadrangle, Pueblo County, Colorado: Miscellaneous Field Studies Map.

Scott, G.R., and Taylor, R.B., 1974, Reconnaissance geologic map of the Electric Peak Quadrangle, Custer and Saguache counties, Colorado: Miscellaneous Field Studies Map, scale 1:62,500.

Scott, G.R., and Taylor, R.B., 1975, Post-Paleocene Tertiary rocks and Quaternary volcanic ash of the Wet Mountain Valley, Colorado: U.S. Geological Survey Post-Paleocene Tertiary and Quaternary geology 868, 15 p.

Scott, G.R., and Taylor, R.B., 1986, Map showing Late Eocene erosion surface, Oligocene-Miocene paleovalleys, and Tertiary deposits in the Pueblo, Denver, and Greeley 1 degree by 2 degrees quadrangles, Colorado: IMAP, scale 1:250,000.

Scott, G.R., Taylor, R.B., Epis, R.C., and Wobus, R.A., 1978, Geologic map of the Pueblo 1 x 2 Quadrangle, south-central Colorado: IMAP.

Scott, G.R., Van Alstine, R.E., and Sharp, W.N., 1975, Geologic map of the Poncha Springs Quadrangle, Chaffee County, Colorado: Miscellaneous Field Studies Map, scale 1:62,500.

Scott, G.R., and Wobus, R.A., 1973, Reconnaissance geologic map of Colorado Springs and vicinity, Colorado: Miscellaneous Field Studies Map, scale 1:62,500.

Sears, J.D., 1924, Relations of the Browns Park Formation and the Bishop Conglomerate, and their role in the origin of Green and Yampa Rivers: Bulletin of the Geological Society of America, v. 35, p. 279–304.

Segerstrom, K., and Young, E.J., 1972, General geology of the Hahns Peak and Farwell Mountain quadrangles, Routt County, Colorado: U.S. Geological Survey Geological Survey Bulletin 1349, 62 p.

Seismological investigations in the Front Range by MicroGeophysics Corporation, 1977-1994, 1995, MicroGeophysics Corporation Seismic Hazard Estimate.

Shaffer, M.E., 1980, Seismic hazard evaluation, Spinney Mountain Project, Park County, Colorado: Converse Ward Davis Dixon Seismic Hazard Evaluation 78–5129.

Sharps, J.A., 1976, Geologic map of the Lamar Quadrangle, Colorado and Kansas: IMAP, scale 1:250,000.

Sharps, J.A., 1980, Geologic map of the Limon 1 degree by 2 degrees Quadrangle, Colorado and Kansas: IMAP, scale 1:250,000.

Shawe, D.R., 1970, Structure of the Slick Rock district and vicinity, San Miguel and Dolores Counties, Colorado: Report 576C.

Sheehan, A.F., 1994, Study of the seismicity of Colorado:

Sheehan, A.F., Hughes, N.D., and Jones, C.H., 1998, Microearthquake field study of the Front Range of Colorado: Seismological Research Letters, v. 69, no. 2, p. 161.

Sheehan, A.F., and Ruff, L.J., 2000, Microearthquake study of the Colorado Front Range: Combining research and teaching in seismology: Seismological Research Letters, v. 71, no. 2, p. 175–179.

Shroba, R.R., and Carrara, P.E., 1994, Preliminary surficial geologic map of the Rocky Flats Plant and vicinity, Jefferson and Boulder counties, Colorado: Open-File Report.

Shuck, E.L., 1976, A seismic survey of the Ralston Area, Jefferson County, Colorado: Golden, CO, Colorado School of Mines, 50 p.

Siems, P.L., 1967, Volcanic and economic geology of the Rosita Hills and Silver Cliff districts, Custer County, Colorado: Golden, CO, Colorado School of Mines, 222 p.

Siems, P.L., 1968, Volcanic geology of the Rosita Hills and Silver Cliff district, Custer County, Colorado: Colorado School of Mines Quarterly, v. 63, no. 3, p. 89–124.

Simmons, G.C., Shawe, D.R., and Rogers, W.B., 1956, Interim report on exploration in the western part of the Disappointment Valley area, Slick Rock district, San Miguel County, Colorado: U.S. Geological Survey Trace Elements Memorandum Report 881.

Simon, R.B., 1968, The Denver earthquakes, 1962-1967: Earthquake Notes, v. XXXIX, p. 37–40.

Simon, R.B., 1969, Seismicity of Colorado: Consistency of Recent Earthquakes with Those of Historical Record: Science, v. 165, no. 3896, p. 897–899., doi: 10.1126/science.165.3896.897.

Simon, R.B., 1972, Seismicity of Colorado 1969-1970-1971: Earthquake Notes, v. XLIII, p. 5–13.

Simon, R.B., Stover, C.W., Person, W.J., and Minsch, J.H., 1977, Earthquakes in the United States, April-June 1976: U.S. Geological Survey Report 766B.

Simon, R.B., Stover, C.W., and Reagor, B.G., 1979, Earthquakes in the United States, January-March 1977: U.S. Geological Survey Report 788A.

Sims, P.K., Osterwald, F.W., and Tooker, E.W., 1954, Uranium deposits in the Eureka Gulch area, Central City district, Gilpin County, Colorado: U.S. Geological Survey Report 125.

Singewald, Q.D., 1966, Description and Relocation of Part of the Ilse Fault Zone, Wet Mountains, Colorado: U.S. Geological Survey 500–C, 20–24 p.

Slemmons, D.B., 1977, State-of-the-art for assessing earthquake hazards in the United States: Mackay School of Mines, University of Nevada Miscellaneous Paper S-73-1, 1–117 p.

Smith, J.H., 1964, Geology of the sedimentary rocks of the Morrison quadrangle, Colorado: Report 428.

Smith, R.P., 1979, Early Rift Magmatism at Spanish Peaks, Colorado, in Riecker, R.E., editor, Rio Grande Rift: Tectonics and Magmatism: Washington, D.C., American Geophysical Union, p. 313–321.

Spence, W., 1982, Review of the Denver Water Department induced seismicity program at Strontia Springs, Colorado: U.S. Geological Survey Report 82–64.

Spence, W.J., Herrmann, R.B., Johnston, A.C., and Reagor, B.G., 1993, Responses to Iben Browning’s prediction of a 1990 New Madrid, Missouri, earthquake: U.S. Geological Survey Report 1083.

Spence, W., and Langer, C.J., 1994, Similarities among significant earthquakes in the Front Range, Colorado, and in the Laramie Mountains, Wyoming (Abstract only), in 1994 Spring Meeting – Baltimore, MD, American Geophysical Union, p. 241.

Spence, W., Langer, C.J., and Choy, G.L., 1996, Rare, large earthquakes at the Laramide Deformation Front – Colorado (1882) and Wyoming (1984): Bulletin of the Seismological Society of America, v. 86, no. 6, p. 1804–1819.

Spence, W., Martin, R.A., Wong, I.G., Butler, D., Ake, J., Nicholl Jr, J.J., and Dickson, P.A., 1988, Seismicity across the southern boundary between the Colorado Plateau and the southern Rocky Mountains (Abstract only), in 1988 Centennial Celebration Program – Denver, CO, Geological Society of America, p. A15.

Staatz, M.H., and Trites, A.F., 1952, Geology of the Quartz Creek Pegmatite District, Gunnison County Colorado: Report 138.

Stager, H.K., 1950, Carnotite resources of the Maverick group area, Mesa County, Colorado: U.S. Geological Survey Report 117.

Stager, H.K., 1951, Carnotite resources of the Calamity group area, Mesa County, Colorado: U.S. Geological Survey Report 146.

Steinberg, D.M., and Leonard, G., 1986, Comment and reply on “Evaluating point concentrations on a map: earthquakes in the Colorado Lineament”: Geology, v. 14, no. 11, p. 971–973.

Steven, T.A., 2002, Late Cenozoic tectonic and geomorphic framework surrounding the evaporite dissolution area in west-central Colorado: Geological Society of America Special Paper, v. 366, p. 15–30.

Steven (compiler), T.A., Lipman, P.W., Hail Jr., W.J., Barker, F., and Luedke, R.G., 1974, Geologic map of the Durango Quadrangle, southwestern Colorado: IMAP, scale 1:250,000.

Steven, T.A., Evanoff, E., and Yuhas, R.H., 1997, Middle and late Cenozoic tectonic and geomorphic development of the Front Range of Colorado, in Geologic History of the Colorado Front Range: Rocky Mountain Association of Geologists Colorado Front Range Guidebook, p. 115–124.

Steven, T.A., Hon, K., and Lanphere, M.A., 1995, Neogene geomorphic evolution of the central San Juan Mountains near Creede, Colorado: IMAP.

Stewart, J.H., 1953, Carnotite resources of the Moon Mesa and Horse Mesa areas, Mesa and Montrose Counties, Colorado: U.S. Geological Survey Report 165.

Stewart, W.A., 1955, Structure of the Foothills Area west of Denver, Colorado, in Field Conference Guidebook: Rocky Mountain Association of Geologists, p. 25–30.

Stoughton, D., 1977, Interpretation of seismic reflection data from the San Luis Valley, south-central Colorado: Golden, CO, Colorado School of Mines, 219 p.

Stover, C.W., and Coffman, J.L., 1993, Seismicity of the United States, 1568-1989 (revised): U.S. Geological Survey Report 1527.

Stover, C.W., Minsch, J.H., Baldwin, F.W., and Brewer, L.R., 1984, Earthquakes in the United States, October-December 1982: U.S. Geological Survey Report 896D.

Stover, C.W., Minsch, J.H., Dunbar, P.K., and Reagor, B.G., 1982a, Earthquakes in the United States, April-June 1981: U.S. Geological Survey Report 871B.

Stover, C.W., Minsch, J.H., and Reagor, B.G., 1982b, Earthquakes in the United States, October-December 1981: U.S. Geological Survey Report 871D.

Stover, C.W., Minsch, J.H., Reagor, B.G., and Baldwin, F.W., 1983, Earthquakes in the United States, January-March 1982: U.S. Geological Survey Report 896A.

Stover, C.W., Reagor, B.G., and Algermissen, S.T., 1988, Seismicity map of the state of Colorado: Miscellaneous Field Studies Map.

Stover, C.W., Simon, R.B., and Person, W.J., 1979, Earthquakes in the United States, July-September 1977: U.S. Geological Survey Report 788C.

Streufert, R.K., and Kirkham, R.M., 1996, Structural styles and age of deformation on the southern flank of the White River Uplift, Colorado (Abstract only), in 1996 Annual Meeting – Tectonics II: Cordilleran Tectonics 1: Denver, CO, Geological Society of America, p. A-116.

Strontia Springs diversion dam, 1976, Harsa Engineering Company Summary Design Report 732.

Sugiura, R., and Kitcho, C.A., 1981, Collapse Structures in the Paradox Basin, in Wiegand, D.L., editor, 1981 Field Conference – Geology of the Paradox Basin: Rocky Mountain Association of Geologists, p. 33–45.

Sullivan, J.T., Meeder, C.A., Martin Jr., R.A., and West, M.W., 1980, Seismic hazard evaluation ridgway dam and reservoir site Dallas Creek Project, Colorado:

Symposium on Geology, Seismicity, Environmental Impact, 1973, Hollywood, CA, Association of Environmental and Engineering Geologists, 113 p.

Szabo, B.J., and Rosholt, J.N., 1989, Uranium-series nuclides in the Golden fault, Colorado, U.S.A.: dating latest fault displacement and measuring recent uptake of radionuclides by fault-zone materials: Applied Geochemistry, v. 4, no. 2, p. 177–182., doi: 10.1016/0883-2927(89)90048-6.

Tafoya, R.E. (Ed.), 1994, The Colorado School of Mines Quarterly Review of Engineering, Science, Education and Research: Golden, CO, Colorado School of Mines, 67 p.

Taylor, R.B., 1974, Reconnaissance geologic map of the Deer Peak quadrangle and southern part of the Hardscrabble Mountain Quadrangle, Custer and Huerfano counties, Colorado: IMAP.

Taylor, R.B., Scott, G.R., and Wobus, R.A., 1975a, Reconnaissance geologic map of the Howard Quadrangle, central Colorado: IMAP, scale 1:62,500.

Taylor, R.B., Scott, G.R., Wobus, R.A., and Epis, R.C., 1975b, Reconnaissance geologic map of the Royal Gorge Quadrangle, Fremont and Custer counties, Colorado: IMAP, scale 1:62,500.

Thenhaus, P.C., McKeown, F.A., Bucknam, R.C., Ross, D.C., Anderson, R.E., Irwin, W.P., Russ, D.P., and Diment, W.H., 1983, Summary of workshops concerning regional seismic source zones of parts of the conterminous United States, convened by the U.S. Geological Survey, 1979-1980, Golden, Colorado: Report 898, 15–19 p.

Theobald Jr., P.K., and Chew III, R.T., 1955, Geology and uranium deposits of part of the Browns Park formation, Colorado, Wyoming, and Utah — a preliminary report: Report 423.

Thompson, R.A., and Machette, M.N., 1989, Geologic map of the San Luis Hills Area, Conejos and Costilla Counties, Colorado: IMAP.

Thurston, W.R., 1952, Pegmatites of the Crystal Mountain district, Larimer County, Colorado: U.S. Geological Survey Trace Elements Investigations Report 139.

Trace, R.D., 1950, Carnotite Resources in the radium group area, San Miguel County, Colorado: U.S. Geological Survey Report 113.

Trench recommendations.

Trowbridge Grose, L., 1972, Geologic formations and structure of Colorado Springs area, Colorado: The Mountain Geologist, v. 9, p. 229–237.

Tweto, O., 1956, Geologic map of the Tennessee Pass area, Eagle and Lake counties, Colorado: Miscellaneous Field Studies Map.

Tweto, O., 1961, Late Cenozoic Events of the Leadville District and Upper Arkansas Valley, Colorado: p. 352.

Tweto, O., 1968, Leadville district, Colorado, in Ore Deposits of the United States, 1933-1967: New York, The American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., p. 682–705.

Tweto, O., 1973a, Reconnaissance geologic map of the Dillon 15-minute Quadrangle, Summit, Eagle, and Grand counties, Colorado: Open-File Report.

Tweto, O., 1973b, Reconnaissance geologic map of the Mount Powell 15-minute Quadrangle, Grand, Summit, and Eagle counties, Colorado: Open-File Report, scale 1:62,500.

Tweto, O., 1976, Geologic map of the Craig 1 x 2 Quadrangle, northwestern Colorado: IMAP.

Tweto, O., 1979, The Rio Grande Rift System in Colorado, in Riecker, R.E., editor, Rio Grande Rift: Tectonics and Magmatism: Washington, D.C., American Geophysical Union, p. 33–56.

Tweto, O., 1980a, Precambrian geology of Colorado, in Colorado Geology, 1980 Symposium: Denver, CO, Rocky Mountain Association of Geologists, p. 37–46.

Tweto, O., 1980b, Summary of Laramide Orogeny in Colorado, in Colorado Geology: Rocky Mountain Association of Geologists, p. 129–134.

Tweto, O., 1980c, Tectonic history of Colorado, in Colorado Geology: Denver, CO, Rocky Mountain Association of Geologists, p. 5–9.

Tweto, O., Bryant, B., and Williams, F.E., 1970, Mineral resources of the Gore Range-Eagles Nest and vicinity, Colorado: U.S. Geological Survey Geological Survey Bulletin 1319–C.

Tweto, O., and Case, J.E., 1972, Gravity and magnetic features as related to geology in the Leadville 30-minute Quadrangle, Colorado: U.S. Geological Survey Report 726C.

Tweto (compiler), O., 1976, Preliminary geologic map of Colorado: Miscellaneous Field Studies Map.

Tweto, O., Moench, R.H., and Reed Jr., J.C., 1978, Geologic map of the Leadville 1 degree by 2 degrees Quadrangle, northwestern Colorado: IMAP.

Tweto, O., and Reed Jr., J.C., 1973, Reconnaissance geologic map of the Ute Peak 15-minute Quadrangle, Grand and Summit counties, Colorado: Open-File Report.

Tweto, O., and Sims, P.K., 1963, Precambrian ancestry of the Colorado Mineral Belt: Geological Society of America Bulletin, v. 74, p. 991–1014.

Two earthquake fault lines located near Colorado Springs Online, about:reader?url=http%3A%2F%2Fwww.krdo.com%2Fnews%2Flocal-news%2F2-earthquake-fault-lines-located-near-colorado-springs%2F34790565, accessed December 2016.

Two Forks Reservoir letters and memos.

Unruh, J.R., Noller, J.S., and Lettis, W.R., 1993a, Quaternary faults of the central Rocky Mountains, Colorado: a new seismotectonic evaluation (Abstract only), in 89th Annual Cordilleran Section; 46th Annual Rocky Mountain Section – Reno, NV, Geological Society of America, p. 157.

Unruh, J.R., Sonder, L.J., and Jones, C.H., 1998, Relation of gravitationally driven lithospheric extension to low slip-rate faults and regional seismic hazards in the western United States: Utah Geological Survey Miscellaneous Publication 98–2, 167–179 p.

Unruh, J.R., Wong, I.G., Bott, J.D.J., Silva, W.J., and Lettis, W.R., 1993b, Rifle Gap Dam, Silt Project Ruedi Dam, Fryingpan-Arkansas Project: U.S. Bureau of Reclamation Seismotectonic Evaluation.

Unruh, J.R., Wong, I.G., Hitchcock, C.S., Bott, J.D.J., Silva, W.J., and Lettis, W.R., 1994, Pueblo Dam – Fryingpan – Arkansas Project: U.S. Bureau of Reclamation Seismotectonic Evaluation.

Unruh, J.R., Wong, I.G., Knudsen, K.L., Bott, J.D.J., Becker, A., Silva, W.J., and Lettis, W.R., 1996, Rattlesnake and Flatiron Dams; Colorado-Big Thompson Project: Seismotectonic Evaluation.

Upson, J.E., 1938, Structures of the Colorado Front Range (Abstract only): Proceedings of the Geological Society of America, p. 316–317.

Upson, J.E., 1939, Physiographic subdivisions of the San Luis Valley, southern Colorado: The Journal of Geology, v. XLVII, p. 721–736.

Upson, J.E., 1971, Physiographic subdivisions of the San Luis Valley, southern Colorado, in Guidebook of the San Luis Basin, Colorado: New Mexico Geological Society, p. 113–122.

US Atomic Energy COM, 1973, Rules and Regulations: Federal Register, v. 38, no. 218, p. 31281–31282.

Utada, M., and Vine, J.D., 1985, Zonal distribution of zeolites and authigenic plagioclase, Spanish Peaks region, southern Colorado, in Conference Proceeding, Sixth International Zeolite Conference: Reno, NV, p. 604–615.

Van Alstine, R.E., 1968, Tertiary trough between the Arkansas and San Luis Valleys, Colorado: U.S. Geological Survey Professional Paper 600–C, C158–C160 p.

Van Alstine, R.E., 1974, Geology and mineral deposits of the Poncha Springs SE Quadrangle, Chaffee County, Colorado: U.S. Geological Survey Report 829.

Van Alstine, R.E., 1975, Geologic map of the Bonanza NE Quadrangle, Chaffee and Saguache counties, Colorado: Open-File Report.

Van Alstine, R.E., and Cox, D.C., 1969, Geology and mineral deposits of the Poncha Springs NE quadrangle, Chaffee County, Colorado, with a section on Fluorspar mines and prospects: U.S. Geological Survey Report 626.

Van Poollen, H.K., 1969, Pumping tests: Rocky Mountain Arsenal Disposal Well September-October 1968: U.S. Army Engineer District.

Vetter, U., 1998, Preliminary seismic hazard assessment for Rattlesnake, Flatiron, Horsetooth, Soldier Canyon, Dixon Canyon, Spring Canyon, and Carter Lake Dams, Colorado-Big Thompson Project, Colorado: U.S. Bureau of Reclamation Technical Memorandum D8330-98–032.

Vetter, U.R., Ake, J.P., and O’Connell, D.R.H., 1995, Seismicity near Ridgway Dam, southwestern Colorado (Abstract only): Seismological Research Letters, v. 66, no. 2, p. 48.

Wallace, R.E., 1975a, Fault scarp geomorphology and seismic history, north-central Nevada (Abstract only), in Cordilleran Section 71st Annual Meeting – Boulder, CO, Geological Society of America, p. 385.

Wallace, R.E., 1975b, Geometry and rates of change of fault-generated range fronts, north-central Nevada (Abstract only), in 1975 Annual Meetings – Salt Lake City, UT, Geological Society of America, p. 1310–1311.

Wallace, R.E., 1977, Profiles and ages of young fault scarps, north-central Nevada: Geological Society of America Bulletin, v. 88, p. 1267–1281.

Wallace, A.R., 1995, Cenozoic rift-related sedimentation and faulting, Northern Culebra Range, Southern Colorado, in 46th Field Conference – Geology of the Santa Fe Region: New Mexico Geological Society, p. 147–154.

Wallace, S.R., Muncaster, N.K., Jonson, D.C., Mackenzie, W.B., Bookstrom, A.A., and Surface, V.E., 1968, Multiple intrusion and mineralization at Climax, Colorado, in Ore Deposits of the United States, 1933-1967: New York, NY, American Institute of Mining, Metallurgical, and Petroleum Engineers, p. 605–640.

Wang, Y.-L., 1965, Local hypocenter determinations in linearly varying layers applied to earthquakes in the Denver area: Golden, CO, Colorado School of Mines, 465 p.

Warner, L.A., 1980, The Colorado Lineament, in Colorado Geology:, p. 11–21.

Wayne A. Charlie, Raymond J. Battalora, Thomas J. Siller, Donald O. Doehring, and John W. van de Lindt, 2006, Colorado Earthquakes and Active Faults, in GEO-evolution: The Evolution of Colorado’s Geological and Geotechnical Engineering Practice: Denver, CO Proceedings, p. 1–15., doi: 10.1061/9780784408902.

Weber, J.R., 1971, Structural geology of the northeastern flank of the Uinta Mountains, Moffat County, Colorado: The Mountain Geologist, v. 8, no. 4, p. 163–181.

Weimer, R.J., 1973, A guide to uppermost Cretaceous stratigraphy, central Front Range, Colorado; deltaic sedimentation, growth faulting and early Laramide crustal movement: The Mountain Geologist, v. 10, no. 1, p. 53–97.

Weimer, R.J., 1976, Cretaceous Stratigraphy, Tectonics and Energy Resources, Western Denver Basin: Colorado School of Mines Professional Contributions, v. 8, p. 180–227.

Weimer, R.J., 1978, Influence of transcontinental arch on Cretaceous marine sedimentation: a preliminary report, in Energy Resources of the Denver Basin: Denver, CO, Rocky Mountain Association of Geologists, p. 211–222.

Weimer, R.J., 1980, Recurrent movement on basement faults, a tectonic style for Colorado and adjacent areas, in Colorado Geology: Denver, CO, Rocky Mountain Association of Geologists, p. 23–35.

Weisser, R.R., 1982, Supplemental seismic hazard evaluation Ridgway Dam and Reservoir Site Dallas Creek Project Colorado: U.S. Bureau of Reclamation Supplemental Seismic Hazard Evaluation D-1620.

Wells, D.L., and Coppersmith, K.J., 1994, New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement: Bulletin of the Seismological Society of America, v. 84, no. 4, p. 974–1002.

West, M.W., 1977, A preliminary evaluation of the Quaternary geology, reported surface faulting, and seismicity along the east flank of the Gore Range, Summit County, Colorado: Golden, CO, Colorado School of Mines, 438 p.

West, M.W., 1978, Quaternary Geology and Reported Surface Faulting Along East Flank of Gore Range, Summit County, Colorado: Colorado School of Mines Quarterly, Golden, CO, Colorado School of Mines, Colorado School of Mines Quarterly, 75 p.

West, M.W., 1997, Differentiation of landsliding from seismogenic faulting: criteria from the southern Rocky Mountains and Columbia Plateau (Abstract only), in American Geophysical Union Spring Meeting – Baltimore, MD, American Geophysical Union.

West, M.W., and Trowbridge Grose, L., 1982, Geologic evaluation of earthquake hazards in the Front Range Urban Corridor, Colorado:

West, D.O., and Vahdani, S., 1998, Report on the development of probabilistic earthquake ground motions for the CC&V project, Victor, Colorado:

Wheeler, R.L., 1985, Evaluating point concentrations on a map- earthquakes in the Colorado lineament: Geology, v. 13, no. 10, p. 701–704.

Wheeler, R.L., 2005, Known or Suggested Quaternary Tectonic Faulting, Central and Eastern United States—New and Updated Assessments for 2005: U. S. Geological Survey Open-File 2005–1336, 40 p.

Wheeler, R.L., and Crone, A.J., 2001, Known and suggested quaternary faulting in the midcontinent United Staes: Engineering Geology, v. 62, p. 51–78.

Wiggins, J.H., Slosson, J.E., and Krohn, J.P., 1978, Natural Hazards: earthquake, landslide, expansive soils-loss models: J. H. Wiggins Company.

Williams, P.L., 1964, Geology, structure, and uranium deposits of the Moab quadrangle, Colorado and Utah: Miscellaneous Investigations Series, scale 1:250,000.

Williamson, J.V., and Shaffer, M.E., 1982, Seismic Analysis of Spinney Mountain Dam, in Proceedings of the 14th Congress of the International Commission on Large Dams: Rio de Janeiro, BR, R. W. Beck and Associates, p. 643–660.

Wilmarth, V.R., and Smith, L.E., 1952, Results of diamond drilling and geologic investigation of the Shirley May (Garo) uranium deposit, Park County, Colorado: U.S. Atomic Energy Commission Report 277.

Wilmarth, V.R., and Vickers, R.C., 1952, The Robinson and Weatherly uraniferous pyrobitumen deposits near Placerville, San Miguel County, Colorado: U.S. Geological Survey Report 176.

Wilson, A.B., and Benson, M.E., 2004, Where in the U.S. is the naturally occurring frac sand? Frac Sand Insider Conference, Pittsburgh, PA.

Withington, C.F., 1951, Carnotite resources of the upper group area, San Miguel County, Colorado: U.S. Geological Survey Report 145.

Witkind, I.J., 1976, Preliminary map showing known and suspected active faults in Colorado: Open-File Report.

Wobus, R.A., and Scott, G.R., 1977, Reconnaissance geologic map of the Cascade Quadrangle, El Paso County, Colorado: Open-File Report.

Wong, I.G., 1988a, Earthquake hazards in the Rocky Mountain region: an overview (Abstract only), in 1988 Centennial Celebration Program – Denver, CO, Geological Society of America, p. A15–A16.

Wong, I.G., 1988b, Recent seismicity in Colorado: implications to earthquake hazards (Abstract only), in 1988 Centennial Celebration Program – Denver, CO, Geological Society of America, p. A15.

Wong, I.G., 1991, The 1986 Crested Butte, Colorado earthquake swarm: The Mountain Geologist, v. 28, no. 1, p. 3–8.

Wong, I.G., 1998, Earthquakes and their hazards in western Colorado: implications to seismic design and safety:

Wong, I., 2002, Historical seismicity, earthquake potential, and seismic hazards in Colorado: moderate hazard and high risk, maybe:, Oakland, CA.

Wong, I.G., Bott, J.D.J., and Ake, J.P., 1994, Earthquakes and tectonic stresses in western Colorado (Abstract only): Geological Society of America Abstracts with Programs, p. 69.

Wong, I.G., Bott, J.D., Ake, J., and Unruh, J.R., 1996, Earthquake hazard in central Colorado (Abstract only), in Annual Meeting – Session 112: Denver, CO, Geophysics, p. A-283.

Wong, I.G., Bott, J.D.J., Gorton, A.E., and Green, R.K., 1995, Probabilistic seismic hazard analysis of the Henderson Tailing Dam- North-Central Colorado: Woodward-Clyde Federal Services.

Wong, I.G., Cash, D.J., and Jaksha, L., 1984, The Crownpoint, New Mexico, Earthquakes of 1976 and 1977: Bulletin of the Seismological Society of America, v. 74, no. 6, p. 2435–2449.

Wong, I., and Humphrey, J.R., 1986, 14 August 1983 Cimarron, Colorado earthquake and the Cimarron fault: The Mountain Geologist, v. 23, no. 1, p. 14–18.

Wong, I.G., and Humphrey, J.R., 1989, Contemporary seismicity, faulting, and the state of stress in the Colorado Plateau: Geological Society of America Bulletin, v. 101.

Woodward-Clyde Consultants, 1986, Paradox Basin project: Draft project summary report, Chapter 1 geology: San Francisco, CA, Woodward-Clyde Consultants, 325 p.

Wychgram, D.C., 1972, Geologic remote sensing study of the Hayden Pass-Orient Mine area, northern Sangre de Cristo Mountains, Colorado: Colorado School of Mines Remote Sensing Report 72–3.

Wyss, M., and Molnar, P., 1972, Efficiency, Stress Drop, Apparent Stress, Effective Stress, and Frictional Stress of Denver, Colorado Earthquakes: Journal of Geophysical Research, v. 77, no. 8, p. 1433–1438., doi: 10.1029/JB077i008p01433.

Zellman, M., Ostenaa, D.A., Mahan, S.A., Briggs, R.W., Duross, C.B., Reitman, N.G., Personius, S.F., and Morgan, M.L., 2017, New Constraints on the Late Quaternary Slip Rate of the Cheraw Fault, Southeastern Colorado, in Seismological Society of America Annual Meeting – Denver, CO, Seismological Society of America.

Ziegler, V., 1917, Foothills structure in northern Colorado: The Journal of Geology, v. 25, no. 8, p. 715–740.

CGS Earthquake-related Publications

ON-001 — Colorado Earthquake and Fault Map — shows a variety of information including Cenozoic faults. (supersedes publications B-46, B-52, B-52B, and IS-60).

County-based HAZUS reports — A primary resource for planners and emergency responders state-wide.

Colorado Earthquake Hazards Mitigation Council. “MI-95 Colorado Earthquake Hazards.” Colorado Geological Survey, Department of Natural Resources, 2013. https://coloradogeologicalsurvey.org/publications/colorado-earthquake-hazards.

Colorado Geological Survey. “RockTalk V05N2, April 2002 – Earthquakes in Colorado.” RockTalk, April 2002.

Colorado Geological Survey and CEHMC. “OF-20-08 Earthquakes in Colorado.” Colorado Geological Survey, July 4, 2020. https://coloradogeologicalsurvey.org/publications/earthquakes-in-colorado.

Erslev, Eric A., and Joe D. Gregson. “OF-96-04-25 Oblique Laramie Convergence in the Northeastern Front Range: Regional Implications for the Analysis of Minor Faults.” Fieldtrip. Open File Report. Denver, CO: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 1996. https://coloradogeologicalsurvey.org/publications/oblique-laramide-convergence-front-range-regional-minor-faults-colorado.

Kirkham, R. M., W. P. Rogers, L. Powell, M. L. Morgan, V. Matthews, and G. R. Pattyn. “Bulletin 52B – Earthquake and Late Cenezoic Fault and Fold Map Server.” Earthquake. Bulletin. Denver, CO: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 2004. https://cgsarcimage.mines.edu/ON-001.

Kirkham, Robert M. “OF-78-03 Earthquake Potential in Colorado: A Preliminary Evaluation.” Earthquakes. Open File Reports. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1978. https://coloradogeologicalsurvey.org/publications/earthquake-potential-colorado-1978.

Kirkham, Robert M., and William P. Rogers. “Bulletin 43 – Earthquake Potential in Colorado: A Preliminary Evaluation.” Earthquake. Bulletin. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1981. https://coloradogeologicalsurvey.org/publications/earthquake-potential-colorado.

———. “Bulletin 46 – Colorado Earthquake Data and Interpretations 1867-1985.” Earthquake. Bulletin. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1985. https://coloradogeologicalsurvey.org/publications/colorado-earthquake-data-interpretation-1867-1985.

———. “Bulletin 52 – Colorado Earthquake Information, 1867-1996.” Earthquake. Bulletin. Denver, CO: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 2000. https://coloradogeologicalsurvey.org/publications/colorado-earthquake-information-1867-1996.

———. “OF-86-08 An Interpretation of the November 7, 1882 Colorado Earthquake.” Earthquake. Open File Report. Denver. CO: Colorado Geological Survey, Department of Natural Resources, 1986. https://coloradogeologicalsurvey.org/publications/interpretation-november-7-1882-colorado-earthquake.

Morgan, Matthew L. “OF-03-04 Published Faults of the Colorado Front Range.” Faults. Open File Reports. Denver, CO: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 2003. https://coloradogeologicalsurvey.org/publications/published-faults-front-range-colorado.

Morgan, Matthew L., and F. Scot Fitzgerald. “ON-001 Colorado Earthquake and Fault Map.” Earthquake, (variable) online map. Golden, CO: Colorado Geological Survey, July 1, 2019. https://cgsarcimage.mines.edu/ON-19-01/.

Morgan, Matthew L., and Karen S. Morgan. “OF-11-06 Preliminary Damage Report of the August 22, 2011 Mw 5.3 Earthquake near Trinidad, Colorado.” Earthquake Damage. Open File Report. Denver, CO: Colorado Geological Survey, Department of Natural Resources, September 2011.

Nuhfer, Edward B., Richard J. Proctor, and Paul H. Moser. MI-57 The Citizens’ Guide to Geologic Hazards: A Guide to Understanding Geologic Hazards, Including Asbestos, Radon, Swelling Soils, Earthquakes, Volcanoes, Landslides, Subsidence, Floods, and Coastal Hazards. Westminster, CO: The American Institute of Professional Geologists, 1993. https://coloradogeologicalsurvey.org/publications/citizens-guide-geologic-hazards/.

Oaks, Sherry D., and Robert M. Kirkham. “IS-23 Results of a Search for Felt Reports for Selected Colorado Earthquakes.” Earthquakes. Information Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1986. https://coloradogeologicalsurvey.org/publications/felt-reports-colorado-earthquakes.

Ostenaa, Dean A., and Mark S. Zellman. “MI-97 Paleoseismic Investigation of the Cheraw Fault at Haswell, Colorado.” Paleoseismic. Miscellaneous Investigations. Golden, CO: Colorado Geological Survey, November 2018. https://coloradogeologicalsurvey.org/publications/paleoseismic-investigations-cheraw-fault.

Rogers, William P., and Robert M. Kirkham. “SP-28 Contributions to Colorado Seismicity and Tectonics – A 1986 Update.” Seismicity and Tectonics. Special Publication. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1986. https://coloradogeologicalsurvey.org/publications/colorado-seismicity-tectonics-1986.

“SP-19 Colorado Tectonics, Seismicity and Earthquake Hazards: Proceedings and Field Trip Guide of a Symposium Held in Denver, Colorado, June 4-6, 1981.” Tectonics, Seismicity, and Earthquake. Special Publication. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1981. https://coloradogeologicalsurvey.org/publications/colorado-tectonics-seismicity-earthquake-hazards.

Contact Us

Use this form to contact us about access to the Earthquake Reference Collection>

Earthquake Reference Collection

Contact Us

Sign up for occasional announcements