On August 22, 2011, a 5.3 magnitude earthquake occurred west-southwest of the city of Trinidad. There were no casualties and only a small amount of damage was reported. It was the second-largest earthquake in Colorado's history, the largest being a magnitude 6.6 earthquake, recorded in 1882. Four minor earthquakes rattled Colorado on August 24, 2018, ranging from magnitude 2.9 to 4.3. , there were 525 recorded earthquakes in Colorado since 1973, a majority of which range 2 to 3.5 on the Richter scale.
On August 22, 2011, a 5.3 magnitude earthquake occurred west-southwest of the city of. Trinidad. There were no casualties and only a small amount of damage was reported. It was the second-largest earthquake in Colorado's history, the largest being a magnitude 6.6 earthquake, recorded in 1882 Four minor earthquakes rattled Colorado on August 24, 2018, ranging from magnitude 2.9 to 4.3. , there were 525 recorded earthquakes in Colorado since 1973, a majority of which range 2 to 3.5 on the Richter scale.