CISN label
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Big Bear Earthquake: Map of background seismicity

Background seismicity 1981 to 2003 shown as black dots. Earthquakes of magnitude 4.0 or larger are shown as blue stars. The most recent activity near Big Bear City shown as red circles with focal mechanism, shown as the beach ball.

02/22/2003 Big Bear Earthquake
CISN Earthquake Reports



California Integrated Seismic Network
cisninfo@cisn.org

CGS USGS OES Caltech UC Berkeley