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Bulletin of the Seismological Society of America; June 1979; v. 69; no. 3; p. 825-841
© 1979 Seismological Society of America
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An earthquake swarm at Lake Keowee, South Carolina

PRADEEP TALWANI, DONALD STEVENSON, DAVID AMICK and JIN CHIANG

GEOLOGY DEPARTMENT UNIVERSITY OF SOUTH CAROLINA, COLUMBIA, SOUTH CAROLINA 29208

Abstract

An earthquake swarm occurred near Lake Keowee, South Carolina in January to February 1978. The swarm was monitored by using portable seismographs. The shallow (<3 km), low level (ML less double equals 2.2), intense (up to 200 events per day) activity occurred in a narrow elliptical epicentral region (2 by 3 km). This active area trends NW-SE, normal to local geologic grain, and appears to be related to the steeply dipping NE trending joints.

A search for earlier seismicity in the area suggests that this swarm is possibly related to the Seneca earthquake of 1971 which followed the impounding of Lake Keowee.




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Bulletin of the Seismological Society of America, June 1, 1991; 81(3): 1015 - 1021.
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