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 7:46:34 AM (PDT) on Saturday, July 15, 2023.
The magnitude 0.9 event occurred 1 km (1 miles) NNW of Middletown, CA.
The hypocentral depth is 6 km ( 4 miles).


Magnitude 0.9 - duration magnitude (Md)
Time Saturday, July 15, 2023 at 7:46:34 AM (PDT)
Saturday, July 15, 2023 at 14:46:34 (UTC)
Distance from Middletown, CA - 1 km (1 miles) NNW (337 degrees)
Hidden Valley Lake, CA - 7 km (5 miles) SW (225 degrees)
Cobb, CA - 11 km (7 miles) SE (127 degrees)
The Geysers, CA - 12 km (7 miles) E (99 degrees)
Lower Lake, CA - 17 km (10 miles) S (183 degrees)
Coordinates 38 deg. 45.6 min. N (38.761N), 122 deg. 37.2 min. W (122.620W)
Depth 5.95 km (3.7 miles)
Quality Excellent
Location Quality Parameters Nst=38, Nph=43, Dmin=5.3 km, Rmss=0.06 sec, Erho=0.16 km, Erzz=0.37 km, Gp=82 degrees
Event ID# nc73913286
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