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11/08/1980 Eureka Earthquake

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

California Integrated Seismic Network

CGS USGS OES Caltech UC Berkeley