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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 23 5:00:00 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

 0.9  2013/05/22 13:54:40 35.993N 120.551W  3.9   15 km ( 9 mi) NW  of Parkfield, CA
 2.2  2013/05/21 15:46:38 34.847N 119.245W 12.7   28 km (17 mi) W   of Frazier Park, CA
 1.1  2013/05/21 02:40:11 35.392N 120.894W  0.1    5 km ( 3 mi) NW  of Morro Bay, CA
 1.3  2013/05/20 12:55:54 35.886N 120.437W 11.2    2 km ( 1 mi) SSW of Parkfield, CA
 1.3  2013/05/20 06:52:56 34.984N 120.730W  2.4   11 km ( 7 mi) NNW of Pt. Sal, CA
 0.7  2013/05/20 06:07:53 35.997N 120.574W  0.0   17 km (10 mi) NW  of Parkfield, CA
 1.0  2013/05/19 21:23:56 34.994N 120.693W  7.4   10 km ( 6 mi) NNW of Pt. Sal, CA
 1.5  2013/05/19 21:23:44 34.979N 120.739W  2.4   11 km ( 7 mi) NW  of Pt. Sal, CA
 2.3  2013/05/18 04:28:06 35.627N 120.724W  6.5    3 km ( 2 mi) W   of Paso Robles, CA
 1.7  2013/05/17 12:17:18 35.480N 120.598W  0.0    7 km ( 4 mi) E   of Atascadero, 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)