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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 = Sun Dec 21 2:00:11 PST 2014
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
 1.0  2014/12/20 22:44:06 34.301N 116.850W  5.2    4 km ( 2 mi) N   of Big Bear City, CA
 1.1  2014/12/20 20:45:36 34.299N 116.453W  3.8   21 km (13 mi) N   of Yucca Valley, CA
 2.1  2014/12/20 19:54:34 34.715N 116.073W  1.1    8 km ( 5 mi) E   of Ludlow, CA
 2.8  2014/12/20 15:56:00 34.301N 116.919W  1.1    7 km ( 4 mi) N   of town of Big Bear Lake, CA
 1.3  2014/12/20 15:05:53 34.304N 116.919W  3.3    7 km ( 4 mi) N   of town of Big Bear Lake, CA
 1.2  2014/12/19 19:07:12 34.276N 116.773W  9.1    7 km ( 5 mi) E   of Big Bear City, CA
 1.3  2014/12/19 09:11:56 34.339N 116.875W  1.1    8 km ( 5 mi) NNW of Big Bear City, CA
 1.1  2014/12/19 00:38:42 34.657N 116.655W  4.5   36 km (22 mi) NE  of Lucerne Valley, CA
 2.1  2014/12/18 23:28:26 34.653N 116.648W  1.7   36 km (22 mi) NE  of Lucerne Valley, CA
 1.2  2014/12/18 20:22:49 34.011N 116.772W 14.8   10 km ( 6 mi) N   of Cabazon, CA
 1.3  2014/12/16 23:51:07 34.022N 116.321W 10.9   13 km ( 8 mi) S   of Joshua Tree, CA
 2.8  2014/12/16 16:21:28 34.270N 116.695W  8.6   15 km ( 9 mi) E   of Big Bear City, CA
 1.2  2014/12/16 12:52:43 34.330N 116.938W  0.0   10 km ( 6 mi) NNW of town of Big Bear Lake, CA
 0.8  2014/12/15 18:01:56 34.169N 116.803W  8.1    8 km ( 5 mi) NNE of Mt. San Gorgonio, CA
 1.5  2014/12/15 12:29:56 34.340N 116.857W  0.0    8 km ( 5 mi) N   of Big Bear City, CA
 1.2  2014/12/14 19:03:08 34.322N 116.468W  1.7   24 km (15 mi) N   of Yucca Valley, CA
 1.8  2014/12/14 02:25:30 35.111N 116.856W  2.0   27 km (17 mi) S   of Goldstone Lake, CA

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Data Sources

US and World - USGS/NEIC = National Earthquake Information Center
Northern California - UCB = University of California, Berkeley
Southern California - Caltech = California Institute of Technology
Southern California - UCSD = University of California, San Diego
Nevada - UNR = University of Nevada, Reno
Offshore = West Coast & Alaska Tsunami Warning Center
...all members of the Advanced National Seismic System (ANSS)



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