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 9:36:38 AM (PDT) on Thursday, October 16, 2025.
The magnitude 2.1 event occurred 4 km (3 miles) S of Green Valley, CA.
The hypocentral depth is -1 km (-0.30 miles).


Magnitude 2.1 - duration magnitude (Md)
Time Thursday, October 16, 2025 at 9:36:38 AM (PDT)
Thursday, October 16, 2025 at 16:36:38 (UTC)
Distance from Green Valley, CA - 4 km (3 miles) S (176 degrees)
American Canyon, CA - 10 km (6 miles) ENE (65 degrees)
Fairfield, CA - 11 km (7 miles) WSW (249 degrees)
Suisun, CA - 11 km (7 miles) WSW (255 degrees)
Vallejo, CA - 13 km (8 miles) NNE (31 degrees)
Coordinates 38 deg. 12.8 min. N (38.213N), 122 deg. 9.5 min. W (122.159W)
Depth -0.54 km (-0.30 miles)
Quality Poor
Location Quality Parameters Nst=6, Nph=6, Dmin=75.8 km, Rmss=0.13 sec, Erho=2.73 km, Erzz=1.99000001 km, Gp=100 degrees
Event ID# nc75250226
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