There are 604 earthquake incidents in Colorado on record since 1931. The state averages 7 earthquakes per year. The largest earthquake on record for Colorado occurred on 05/17/1973, with a depth of 0.0 miles and a magnitude of 5.4 on the Richter scale in Garfield County, CO.
Yearly Average Number of Earthquakes in Colorado
Total Number of Earthquakes in Colorado since 1931