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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 Jan 20 15:00:03 PST 2019
Here are the earthquakes appearing on this map, most recent at top ...

        y/m/d     h:m:s     deg     deg     km
 1.9 2019/01/19 19:15:44 39.178N 122.291W  7.8   12 km ( 8 mi) WNW of Williams, CA
 2.1 2019/01/19 15:23:23 40.617N 122.423W 21.5    6 km ( 4 mi) ENE of Shasta, CA
 2.7 2019/01/14 10:51:43 40.353N 123.957W 27.9   21 km (13 mi) SE  of Rio Dell, CA
 1.4 2019/01/14 08:36:01 39.456N 122.006W 24.4   18 km (11 mi) ESE of Willows, 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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