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Figure from the 1980-1981 Bulletin of the Seismographic Stations (UC Berkeley), showing the distribution of aftershocks from the Nov 1980 M7.2 Eureka earthquake. The aftershocks align along a northeast-southwest trending fault plane.
06/15/2005 M7.2 offshore of Northern California CISN Earthquake Reports
Northern California Management Center
California Integrated Seismic Network www@cisn.org
Last modified: Wed Jan 17 18:17:55 PST 2007