Recent Earthquakes in California and Nevada


== PRELIMINARY EARTHQUAKE REPORT ==

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


Version #4: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 6:27:37 PM (PDT) on Thursday, September 9, 2021.
The magnitude 1.7 event occurred 4 km (2 miles) W of Central Valley (historical), CA.
The hypocentral depth is 19 km (12 miles).


Magnitude 1.7 - duration magnitude (Md)
Time Thursday, September 9, 2021 at 6:27:37 PM (PDT)
Friday, September 10, 2021 at 1:27:37 (UTC)
Distance from Central Valley (historical), CA - 4 km (2 miles) W (262 degrees)
Shasta Lake, CA - 4 km (2 miles) W (262 degrees)
Shasta, CA - 11 km (7 miles) NE (38 degrees)
Redding, CA - 12 km (7 miles) NNW (342 degrees)
Bella Vista, CA - 16 km (10 miles) WNW (284 degrees)
Coordinates 40 deg. 40.6 min. N (40.676N), 122 deg. 24.8 min. W (122.414W)
Depth 18.75 km (11.7 miles)
Quality Good
Location Quality Parameters Nst=13, Nph=14, Dmin=9.5 km, Rmss=0.17 sec, Erho=0.78 km, Erzz=0.66 km, Gp=56 degrees
Event ID# nc73622856
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For more information, see https://earthquake.usgs.gov

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