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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 = Mon Nov 23 1:00:02 PST 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

 1.9  2009/11/22 10:27:50 34.903N 119.025W 16.2   10 km ( 6 mi) WSW of Grapevine, CA
 1.4  2009/11/20 03:56:35 34.329N 118.803W 15.2    9 km ( 5 mi) NE  of Moorpark, CA
 1.4  2009/11/20 02:25:21 34.297N 118.680W 12.2    3 km ( 2 mi) NE  of Simi Valley, CA
 1.7  2009/11/19 00:40:48 34.764N 118.864W 15.2    4 km ( 2 mi) SSW of Gorman, CA
 1.7  2009/11/18 13:30:14 33.926N 118.534W 14.6    9 km ( 6 mi) WSW of Los Angeles Airport, CA
 2.0  2009/11/17 14:47:05 34.346N 119.526W  6.0    6 km ( 3 mi) S   of Carpinteria, CA
 1.2  2009/11/16 21:46:55 34.844N 118.867W  4.8    5 km ( 3 mi) NNW of Gorman, CA
 2.2  2009/11/16 19:03:31 33.462N 118.304W  5.5   13 km ( 8 mi) N   of Avalon, Catalina Island, 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)