Definition: The word "Colorado Earthquake" refers to a series of earthquakes that occurred in Colorado from April 26, 1970, to May 14, 1970. These quakes were caused by the collapse of the Santa Fe fault, which is located close to the Colorado Plateau. The word "colorado" is a shortening of the name for the region (Colorado Plateau), and it refers to the geological features in this area that are characteristic of the region.