Recent Earthquakes in California and Nevada


== PRELIMINARY EARTHQUAKE REPORT ==

U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California


Version #2: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 9:32:09 AM (PDT) on Sunday, April 4, 2021.
The magnitude 1.8 event occurred 30 km (19 miles) NW of Chester, CA.
The hypocentral depth is 3 km ( 2 miles).


Magnitude 1.8 - duration magnitude (Md)
Time Sunday, April 4, 2021 at 9:32:09 AM (PDT)
Sunday, April 4, 2021 at 16:32:09 (UTC)
Distance from Chester, CA - 30 km (19 miles) NW (308 degrees)
Shingletown, CA - 32 km (20 miles) E (93 degrees)
Burney, CA - 47 km (29 miles) SSE (165 degrees)
Greenville, CA - 61 km (38 miles) NW (308 degrees)
Palo Cedro, CA - 62 km (39 miles) E (99 degrees)
Coordinates 40 deg. 28.5 min. N (40.475N), 121 deg. 30.9 min. W (121.514W)
Depth 3.4 km (2.1 miles)
Quality Good
Location Quality Parameters Nst=6, Nph=9, Dmin=1.3 km, Rmss=0.04 sec, Erho=0.62 km, Erzz=0.41 km, Gp=140 degrees
Event ID# nc73545485
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For more information, see https://earthquake.usgs.gov

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