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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 = Fri Jul 20 14:00:03 PDT 2018
Here are the earthquakes appearing on this map, most recent at top ...

        y/m/d     h:m:s     deg     deg     km
 3.2 2018/07/20 05:29:22 40.411N 125.005W  0.8   65 km (41 mi) WSW of Ferndale, CA
 1.7 2018/07/16 02:38:08 40.286N 124.496W 19.1   38 km (23 mi) SSW of Ferndale, CA
 2.3 2018/07/16 02:28:03 40.465N 124.706W 24.8   39 km (24 mi) WSW of Ferndale, CA
 1.7 2018/07/16 01:11:56 40.295N 124.380W 19.6   32 km (20 mi) SW  of Rio Dell, CA
 2.6 2018/07/15 18:15:16 40.362N 124.570W 22.6   35 km (22 mi) SW  of Ferndale, CA
 2.9 2018/07/14 13:28:06 40.859N 125.377W 25.5   99 km (61 mi) WNW of Ferndale, 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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