Historic Earthquakes
Western Minnesota
1975 07 09 14:54:15 UTC
Magnitude 4.6
Intensity VI
Largest Earthquake in Minnesota
The earthquake caused minor damage to walls and foundations of basements in Stevens County around Morris. Also felt in Iowa, North Dakota, and South Dakota.
The earthquake was felt over an area of approximately 315,000 square kilometers including northern Iowa, Minnesota, southeastern North Dakota, and eastern South Dakota. Maximum intensity was VI. This is the largest earthquake ever instrumentally located in the state of Minnesota. The last strongly felt earthquake in the State was a shock that occurred on September 3, 1917 near Staples with a maximum intensity of VI.
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, and Earthquake Information Bulletin, Volume 7, Number 5.
