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 7:15:35 PM (PDT) on Friday, September 26, 2025.
The magnitude 1.4 event occurred 12 km (7 miles) S of Ridgemark, CA.
The hypocentral depth is 9 km ( 6 miles).


Magnitude 1.4 - duration magnitude (Md)
Time Friday, September 26, 2025 at 7:15:35 PM (PDT)
Saturday, September 27, 2025 at 2:15:35 (UTC)
Distance from Ridgemark, CA - 12 km (7 miles) S (186 degrees)
Hollister, CA - 16 km (10 miles) S (174 degrees)
Chualar, CA - 19 km (12 miles) NE (39 degrees)
San Juan Bautista, CA - 21 km (13 miles) SE (138 degrees)
Gonzales, CA - 23 km (14 miles) NNE (14 degrees)
Coordinates 36 deg. 42.3 min. N (36.706N), 121 deg. 22.8 min. W (121.381W)
Depth 8.99 km (5.60 miles)
Quality Good
Location Quality Parameters Nst=18, Nph=18, Dmin=3.1 km, Rmss=0.06 sec, Erho=0.37 km, Erzz=0.720000029 km, Gp=115 degrees
Event ID# nc75242477
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