Recent Earthquakes in California and Nevada


== PRELIMINARY EARTHQUAKE REPORT ==

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


Version #6: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 9:38:40 AM (PDT) on Sunday, April 4, 2021.
The magnitude 2.2 event occurred 31 km (19 miles) NW of Chester, CA.
The hypocentral depth is 3 km ( 2 miles).


Magnitude 2.2 - duration magnitude (Md)
Time Sunday, April 4, 2021 at 9:38:40 AM (PDT)
Sunday, April 4, 2021 at 16:38:40 (UTC)
Distance from Chester, CA - 31 km (19 miles) NW (309 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. 28.7 min. N (40.478N), 121 deg. 30.8 min. W (121.514W)
Depth 3.22 km (2.0 miles)
Quality Good
Location Quality Parameters Nst=15, Nph=16, Dmin=1.6 km, Rmss=0.06 sec, Erho=0.24 km, Erzz=0.35 km, Gp=114 degrees
Event ID# nc73545490
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