Colorado's Biggest Quakes
| Date | Location | Intensity (Mercalli) |
Magnitude (Richter Scale) |
| Nov. 7, 1882 | North-Central Colorado | VII | 6.2–6.5* |
| Jan. 23, 1966 | Colorado–New Mexico Border | VII | 5.5 |
| Aug. 9, 1967 | northeast Denver | VII | 5.3 |
| Nov. 27, 1967 | northeast Denver | VI | 5.2 |
| Dec. 4, 1870 | Pueblo | VI | -- |
| Oct. 1871 | Lily Park, Moffat County | VI | -- |
| Sept. 17, 1880 | Aspen | VI | -- |
| Dec. 1891 | Maybell | VI | -- |
| Nov. 15, 1901 | Buena Vista | VI | -- |
| Nov. 11, 1913 | Ridgeway area | VI | -- |
| Sept. 9, 1944 | Montrose/Basalt | VI | -- |
| Aug. 3, 1955 | Lake City | VI | -- |
| Oct. 11, 1960 | Montrose/Ridgeway | V | 5.5 |
| Jan. 4, 1966 | northeast Denver | V | 5.0 |
*estimated
Adapted from "Colorado Earthquake Hazards," Colorado Office of Emergency Management, 1999
