1967 08 09 13:25
The main damage occurred in Northglenn, a northern suburb of Denver, but minor damage occurred in many area towns. At Northglenn, concrete pillars were damaged at a church; foundations, concrete floors, and walls cracked; windows broke; and tile fell at a school. At one residence, a piano shifted about 15 cm and a television set overturned. Some bricks fell from a chimney in downtown Denver, damaging a car. This was the largest of a series of earthquakes in the northeast Denver area that were believed to be induced by pumping of waste fluids into a deep disposal well at the Rocky Mountain Arsenal. The Colorado School of Mines recorded more than 300 earthquakes from this zone during 1967. Felt north to Laramie, Wyoming, south to Pueblo, west to Vail, and east to Sterling.
Abridged from Seismicity of the United States, 1568-1989 (Revised), by Carl W. Stover and Jerry L. Coffman, U.S. Geological Survey Professional Paper 1527, United States Government Printing Office, Washington: 1993.