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Brown lines represent known hazardous faults or fault zones. White lines are roads.
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Update time = Tue Jan 28 10:38:48 PST 2020
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

 2.0 2020/01/28 06:02:44 33.852N 117.824W  8.8    4 km ( 3 mi) SSW of Yorba Linda, CA
 1.0 2020/01/26 07:34:08 33.823N 117.047W 15.8    9 km ( 6 mi) WNW of San Jacinto, CA
 0.9 2020/01/26 02:49:34 33.928N 117.034W 14.1    5 km ( 3 mi) W   of Beaumont, CA
 1.6 2020/01/25 23:26:56 33.603N 117.212W 13.3    5 km ( 3 mi) N   of Murrieta, CA
 0.6 2020/01/24 23:03:06 33.666N 117.013W 10.7    8 km ( 5 mi) SE  of Winchester, CA
 1.6 2020/01/24 21:06:13 33.659N 117.016W 10.6    8 km ( 5 mi) SE  of Winchester, CA
 1.2 2020/01/24 20:56:42 33.961N 117.040W 15.9    3 km ( 2 mi) SSE of Calimesa, CA
 0.8 2020/01/24 17:50:19 33.667N 117.016W 10.3    8 km ( 5 mi) SE  of Winchester, CA
 0.8 2020/01/24 17:41:27 33.672N 117.019W 11.2    7 km ( 4 mi) ESE of Winchester, CA
 1.2 2020/01/24 17:30:58 33.661N 117.019W 10.5    8 km ( 5 mi) SE  of Winchester, CA
 1.1 2020/01/23 11:38:48 33.925N 117.879W  7.1    2 km ( 1 mi) ENE of Brea, CA
 1.6 2020/01/23 10:00:26 33.850N 117.504W  1.3    0 km ( 0 mi) W   of Quarry at CORONA  (Probable quarry explosion)
 1.5 2020/01/22 13:00:36 33.859N 117.497W -0.5    1 km ( 1 mi) NNE of Quarry at CORONA  (Probable quarry explosion)
 0.7 2020/01/21 13:00:44 32.834N 117.054W -0.1    2 km ( 1 mi) W   of Quarry at CPE-3  (Probable quarry explosion)

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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)