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Update time = Mon May 21 0:00:02 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

 1.2  2012/05/20 19:25:13 34.031N 117.350W  0.1    6 km ( 3 mi) NNE of Riverside, CA
 1.7  2012/05/20 13:01:25 33.852N 117.813W  4.2    4 km ( 2 mi) S   of Yorba Linda, CA
 1.4  2012/05/20 09:21:05 34.247N 118.451W  3.8    3 km ( 2 mi) N   of Panorama City, CA
 1.9  2012/05/20 07:26:09 34.537N 118.785W 13.1   15 km (10 mi) W   of Castaic Lake dam, CA
 2.1  2012/05/20 06:29:32 34.523N 118.797W 12.8   16 km (10 mi) W   of Castaic Lake dam, CA
 1.3  2012/05/19 02:33:51 33.969N 117.153W 19.4   10 km ( 6 mi) SSE of Redlands, CA
 1.4  2012/05/18 09:30:52 34.005N 117.576W  9.8   10 km ( 6 mi) SE  of Ontario, CA
 2.0  2012/05/18 09:24:43 34.331N 117.279W 15.2   10 km ( 6 mi) SSE of Hesperia, CA
 2.2  2012/05/17 10:32:36 34.865N 118.779W  0.0   10 km ( 6 mi) NE  of Gorman, CA
 1.1  2012/05/17 01:54:04 33.992N 117.177W  9.1    7 km ( 4 mi) S   of Redlands, CA
 1.0  2012/05/16 22:23:54 33.944N 117.206W 13.7   12 km ( 8 mi) SSE of Loma Linda, CA
 0.8  2012/05/16 16:53:34 33.947N 117.204W 12.3   12 km ( 8 mi) SSE of Loma Linda, CA
 1.3  2012/05/16 07:10:22 34.046N 117.527W 17.3    9 km ( 6 mi) SE  of Rancho Cucamonga, CA
 1.3  2012/05/16 01:12:16 33.956N 117.882W 14.3    5 km ( 3 mi) NNE of Brea, CA
 2.8  2012/05/15 21:00:00 33.943N 117.852W 12.9    5 km ( 3 mi) ENE of Brea, CA
 1.3  2012/05/15 14:52:38 34.093N 117.452W  4.7    2 km ( 1 mi) SW  of Fontana, CA
 1.4  2012/05/15 13:31:20 33.860N 117.508W  0.0    6 km ( 3 mi) ESE of Corona, CA
 1.0  2012/05/15 12:41:05 33.672N 117.244W  0.0    8 km ( 5 mi) E   of Lake Elsinore, CA
 1.5  2012/05/14 11:51:09 34.062N 117.851W 10.0    5 km ( 3 mi) SE  of Covina, CA

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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)