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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 May 21 1:00:05 PDT 2012
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  2012/05/20 05:53:20 39.212N 120.059W 10.4    4 km ( 3 mi) SW  of Kings Beach, CA
 0.7  2012/05/18 10:34:03 39.218N 120.070W  8.9    4 km ( 3 mi) WSW of Kings Beach, CA
 1.0  2012/05/18 10:24:28 39.214N 120.072W  8.4    5 km ( 3 mi) WSW of Kings Beach, CA
 1.0  2012/05/18 09:56:07 39.217N 120.071W  9.1    5 km ( 3 mi) WSW of Kings Beach, CA
 1.5  2012/05/18 03:59:13 39.417N 120.157W  7.2   10 km ( 6 mi) NNE of Truckee, CA
 1.2  2012/05/17 13:00:34 40.183N 121.097W  3.8   13 km ( 8 mi) WNW of Greenville, CA
 1.3  2012/05/16 16:07:50 40.125N 121.512W 12.3   31 km (19 mi) SW  of Chester, CA
 0.7  2012/05/15 20:32:56 39.344N 120.024W  4.4   12 km ( 7 mi) N   of Kings Beach, CA
 0.6  2012/05/15 17:59:05 39.243N 120.099W  5.6    6 km ( 4 mi) W   of Kings Beach, CA
 2.3  2012/05/15 13:07:36 40.243N 121.136W  6.2   11 km ( 7 mi) SE  of Chester, CA
 1.1  2012/05/15 11:06:47 40.743N 121.367W  5.2   29 km (18 mi) ESE of Burney, CA
 0.7  2012/05/15 06:15:35 40.249N 121.393W  4.6   15 km ( 9 mi) WSW of Chester, CA
 1.6  2012/05/14 20:50:28 39.877N 120.482W  8.0    8 km ( 5 mi) N   of Portola, 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)