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 9:29:09 PM (PDT) on Friday, September 26, 2025.
The magnitude 0.8 event occurred 15 km (9 miles) SSE of Ridgemark, CA.
The hypocentral depth is 6 km ( 4 miles).


Magnitude 0.8 - duration magnitude (Md)
Time Friday, September 26, 2025 at 9:29:09 PM (PDT)
Saturday, September 27, 2025 at 4:29:09 (UTC)
Distance from Ridgemark, CA - 15 km (9 miles) SSE (166 degrees)
Hollister, CA - 19 km (12 miles) SSE (160 degrees)
Chualar, CA - 21 km (13 miles) NE (54 degrees)
Gonzales, CA - 22 km (14 miles) NNE (28 degrees)
San Juan Bautista, CA - 26 km (16 miles) SE (133 degrees)
Coordinates 36 deg. 41.0 min. N (36.684N), 121 deg. 19.5 min. W (121.325W)
Depth 6.25 km (3.90 miles)
Quality Excellent
Location Quality Parameters Nst=22, Nph=30, Dmin=3.3 km, Rmss=0.07 sec, Erho=0.22 km, Erzz=0.39 km, Gp=58 degrees
Event ID# nc75242492
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For more information, see https://earthquake.usgs.gov

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