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March 1, 2023
115th Annual AASG Meeting, Glenwood Springs, Colorado
The 2023 Association of American State Geologists meeting—hosted by the Colorado Geological Survey—takes place in Glenwood…
hazards
As one of the major areas of the CGS interest and expertise, the identification and mitigation of geological hazards is an important facet of our mission.
Water
November 11, 2022
Case study: Fluvial Hazard Zone
“The Fluvial Hazard Zone (FHZ) is defined as the area a stream has occupied in recent history, may occupy, or…
Hazards
September 23, 2022
The Great Colorado ShakeOut 2022
It’s coming up in less than four weeks! The Great Colorado ShakeOut is a public earthquake drill that takes place…
Geology
August 16, 2022
The Great ShakeOut
The origins of The Great ShakeOut project lie, unsurprisingly, in Southern California, one of the more…
Geology
April 11, 2022
Case Study: Lykins Formation
Small but significant areas of Colorado are underlain by bedrock that is composed of evaporative…
Geology
April 8, 2022
NASA Earth Observatory
One of our favorite online feeds is from the NASA Earth Observatory along with their…
Hazards
March 25, 2022
CGS Seismic Stations
Early History The Colorado School of Mines first acquired and installed a single three-component seismograph in the…
Hazards
June 23, 2021
HAZ-2021-01 Post-wildfire Hazards
Noting that we were getting hundreds of search hits on a previous version of an info-brochure that we originally published…
Hazards
February 8, 2021
The Snowy Torrents
Here in Colorado, avalanche season is not over yet, and it’s been another deadly one with 26 fatalities so far…
Hazards
October 13, 2020
Seismometer installed on campus
Mines students partner with the CGS to install seismometer on campus Colorado School of Mines geophysics students enrolled…
Geology
July 22, 2020
Field Safety
It's field mapping time, and much of our staff are out in several different areas of the state, doing field work. A majority of the field work is part of the STATEMAP program—preparing geologic maps of particular quadrangles for the US Geological Survey sponsors of that nation-wide program.
Hazards
July 14, 2020
Colorado Scientific Society lecture online
TITLE: Historic Avalanches in Hinsdale County, Colorado: Impacts to Lake City, old mining dams, and new evidence for the association…
Hazards
March 20, 2020
Trenching the Cheraw Fault in Southeastern Colorado
One of the missions of the CGS is to better understand the various geological risks that face the residents of…
General
December 13, 2019
Quote: Robert Frost, geohazards expert
Not only sands and gravels Were once more on their travels, But gulping muddy gallons…
Hazards
July 12, 2018
Collapsible Soils
By Jonathan White, Senior Engineering Geologist, Emeritus At the end of the 19th and beginning of…
Hazards
December 30, 2017
Swelling or expansive soils
Colorado has many areas susceptible to the problems that swelling soils cause. This video gives some…
Hazards
September 12, 2017
AEG Annual Meeting
Members of our geoscience staff are busy this week participating in the Annual Meeting of the…
Hazards
August 14, 2017
Landslide Hazard Info for Colorado Springs Residents and Real Estate Professionals
Dramatic landslide headscarp threatens this structure on Constellation Drive in Skyway, Colorado Springs, Colorado, May 2017. Photo credit: Jon Lovekin,…
Hazards
July 9, 2017
What to do before, during, and after an earthquake
Earthquakes strike suddenly, violently, and without warning. While Colorado is not as seismically active as some places, it does have…
Hazards
May 16, 2017
AASG 2017 John C. Frye Memorial Award for CGS publication
The Association of American State Geologists announced that their annual John C.
Hazards
September 3, 2016
CGS seismometer array
The CGS recently installed the first of five new seismic recording stations that will collect information on seismic events…
Hazards
May 5, 2015
Evaporite Karst Subsidence
[ED: Originally written by Jonathan White, Senior Engineering Geologist (emeritus staff) for a 2001 volume of…
Hazards
March 4, 2015
Land subsidence, a growing problem
Deltares, an independent institute for applied research in the field of water and subsurface, hosted fifteen…
Hazards
August 22, 2011
Case Study: The Trinidad, Colorado Earthquakes
[ED: Originally published in 2011 by Vincent Matthews, former State Geologist at the CGS.] Around midnight on August 22,…
Hazards
June 15, 2011
Mine Subsidence Hazards in Colorado
This video, produced by the CGS in 2011, examines the significant geo-hazards related to the long history of underground coal…
Hazards
February 10, 2011
Hazardous Soils in Colorado
This educational video, produced in 2011, explores the various problems that arise from hazardous soil conditions — expansive, collapsible/compressible, hydrocompactive,…
Hazards
July 10, 2009
Case Study: Rockfall – St. Francis of Assisi, Castle Rock
The CGS studied the site of St. Francis of Assisi Church in Castle Rock extensively after a block detached from…
Hazards
July 6, 2005
Case Study: Rockfall – Glenwood Springs
The town of Glenwood Springs in west-central Colorado lies at the confluence of the Roaring Fork and Colorado rivers.
Hazards
June 21, 2005
Case Study: Clear Creek Canyon rockslide
Rockfalls and rock slides are common along transportation corridors in the Rocky Mountains. Clear Creek Canyon just west of Golden…
Hazards
April 26, 2005
Case Study: mine subsidence, CSM
For decades, the west side of the Colorado School of Mines (CSM) main campus had subsidence issues related to…