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Maps are updated within about 5 minutes of an earthquake or once an hour.
Brown lines represent known hazardous faults or fault zones. White lines are roads.
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Update time = Fri Sep 3 13:00:08 PDT 2010
Here are the earthquakes appearing on this map, most recent at top ...

 MAG    DATE    LOCAL-TIME  LAT     LON    DEPTH    LOCATION
        y/m/d     h:m:s     deg     deg     km

 2.5  2010/09/02 09:07:17 40.328N 124.404W 17.0    8 km ( 5 mi) NNW of Punta Gorda, CA
 2.7  2010/08/31 00:48:54 40.592N 124.302W 21.6    4 km ( 2 mi) WNW of Ferndale, CA
 2.4  2010/08/28 18:09:56 40.297N 124.450W 20.5    8 km ( 5 mi) WNW of Punta Gorda, CA
 2.0  2010/08/28 06:05:55 40.456N 124.355W 19.9   16 km (10 mi) SSW of Ferndale, CA

Special maps:
Long Valley || Los Angeles || San Francisco Index map || big earthquake list || all earthquake list || glossary of terms ||

Data Sources

Northern California - USGS = U.S. Geological Survey, Menlo Park
Northern California - UCB = University of California, Berkeley
Southern California - USGS = U.S. Geological Survey, Pasadena
Southern California - Caltech = California Institute of Technology
Southern California - UCSD = University of California, San Diego
Nevada - UNR = University of Nevada, Reno
US and World - USGS/NEIC = National Earthquake Information Center
Offshore = West Coast & Alaska Tsunami Warning Center
...all members of the Advanced National Seismic System (ANSS)