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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 = Sat Jul 4 19:00:04 PDT 2009
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

 0.2  2009/06/30 16:20:17 37.534N 119.021W  7.2   13 km ( 8 mi) SSW of Mammoth Lakes, CA
 0.9  2009/06/28 08:53:53 38.204N 119.255W 15.1    6 km ( 4 mi) SSW of Bridgeport, CA
 1.7  2009/06/28 08:19:17 38.201N 119.252W 16.4    6 km ( 4 mi) SSW of Bridgeport, CA
 1.2  2009/06/28 07:51:19 38.065N 119.095W 15.5   12 km ( 8 mi) N   of Lee Vining, CA
 1.2  2009/06/28 01:09:53 37.694N 119.360W 18.0   22 km (13 mi) ESE of Yosemite Village, 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)