On November 9, 1968, an earthquake shook a 580,000 square-mile area of the central United States, including all or portions of 23 states. At its center in south-central Illinois, the quake reached maximum intensity VII on the Modified Mercalli Scale. The earthquake caused minor damage in the nearest metropolitan centers, Evansville, 50 miles to the east and St. Louis, 110 miles northwest, and also caused alarm in Chicago, over 270 miles to the north. It was also felt in NE Arkansas. The following source coordinates were determined by ESSA's National Earthquake Information Center:
Origin Time: 17:01:40.9 G.M.T. Latitude: 37.96 degrees North Longitude: 88.46 degrees West Focal Depth: 19 kilometers Magnitude: 5.5 (mb)
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Arkansas Center for Earthquake Education and Technology Transfer (ACEETT)
Graduate Institute of Technology
2801 South University
Little Rock AR 72204(501) 569-3085
Last Updated: March 5 , 2001 Copyright 1998, UALR
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