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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 = Thu May 9 2:00:04 PDT 2013
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

 0.7  2013/05/07 08:28:39 37.525N 121.922W  5.9    6 km ( 4 mi) ESE of Fremont, CA
 1.0  2013/05/06 11:41:06 37.800N 121.978W 19.3    2 km ( 1 mi) N   of San Ramon, CA
 1.1  2013/05/06 06:33:15 37.294N 121.666W  4.5   18 km (11 mi) N   of Morgan Hill, CA
 1.8  2013/05/05 13:47:57 37.482N 121.820W  6.5   10 km ( 6 mi) NE  of Milpitas, CA
 1.0  2013/05/03 21:38:30 37.227N 121.968W  3.5    0 km ( 0 mi) E   of Los Gatos, CA
 1.4  2013/05/03 16:07:48 37.430N 121.779W  7.1   11 km ( 7 mi) E   of Milpitas, CA
 1.4  2013/05/03 05:07:21 37.283N 120.001W 22.4   23 km (14 mi) ENE of Le Grand, CA
 1.5  2013/05/02 19:35:57 37.540N 121.841W  4.3   13 km ( 8 mi) E   of Fremont, CA
 0.7  2013/05/02 18:05:00 37.383N 121.799W  4.3   10 km ( 6 mi) ENE of San Jose City Hall, CA

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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)