The Great Colorado ShakeOut - Drop-Cover-Hold On! 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 a history of earthquake activity. Identifying potential hazards ahead of time and advance planning can reduce the dangers of serious injury or loss of life from an earthquake. Repairing deep…