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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 = Tue Jan 28 12:00:03 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

 2.1 2020/01/27 18:09:11 40.525N 123.625W 23.2   37 km (23 mi) W   of Hayfork, CA
 1.6 2020/01/25 06:20:45 40.300N 124.305W 14.5   28 km (17 mi) SW  of Rio Dell, CA
 1.5 2020/01/24 19:31:35 40.304N 124.361W  8.8   31 km (19 mi) SW  of Rio Dell, CA
 1.2 2020/01/24 12:03:01 40.302N 124.358W  8.7   31 km (19 mi) SW  of Rio Dell, CA
 2.2 2020/01/24 04:58:14 40.289N 124.487W 20.2   37 km (23 mi) SSW of Ferndale, CA
 2.3 2020/01/22 17:40:22 40.291N 124.437W 18.9   35 km (22 mi) SSW of Ferndale, CA

Special maps:
Long Valley || Los Angeles || San Francisco Index map || big earthquake list || all earthquake list || glossary of terms ||

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)