Recent Earthquakes in California and Nevada


== PRELIMINARY EARTHQUAKE REPORT ==

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


Version #0: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.

A micro earthquake occurred at 11:32:47 AM (PDT) on Wednesday, April 7, 2021.
The magnitude 1.8 event occurred 1 km (0 miles) SW of East Richmond Heights, CA.
The hypocentral depth is 5 km ( 3 miles).


Magnitude 1.8 - duration magnitude (Md)
Time Wednesday, April 7, 2021 at 11:32:47 AM (PDT)
Wednesday, April 7, 2021 at 18:32:47 (UTC)
Distance from East Richmond Heights, CA - 1 km (0 miles) SW (229 degrees)
Richmond, CA - 2 km (2 miles) ENE (78 degrees)
El Cerrito, CA - 3 km (2 miles) NNW (344 degrees)
San Pablo, CA - 3 km (2 miles) SE (138 degrees)
Rollingwood, CA - 3 km (2 miles) SSE (163 degrees)
Coordinates 37 deg. 56.4 min. N (37.940N), 122 deg. 19.2 min. W (122.320W)
Depth 5.24 km (3.3 miles)
Quality Good
Location Quality Parameters Nst=19, Nph=18, Dmin=7.8 km, Rmss=0.07 sec, Erho=0.23 km, Erzz=0.69 km, Gp=46 degrees
Event ID# nc73546460
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