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 1:46:35 PM (PDT) on Thursday, October 9, 2025.
The magnitude 1.6 event occurred 15 km (9 miles) S of Ridgemark, CA.
The hypocentral depth is 2 km ( 2 miles).
| Magnitude | 1.6 - duration magnitude (Md) |
| Time | Thursday, October 9, 2025 at 1:46:35 PM (PDT) Thursday, October 9, 2025 at 20:46:35 (UTC) |
| Distance from |
Ridgemark, CA - 15 km (9 miles) S (172 degrees) Hollister, CA - 19 km (12 miles) SSE (165 degrees) Chualar, CA - 20 km (12 miles) NE (52 degrees) Gonzales, CA - 21 km (13 miles) NNE (25 degrees) San Juan Bautista, CA - 25 km (16 miles) SE (137 degrees) |
| Coordinates | 36 deg. 40.8 min. N (36.680N), 121 deg. 20.6 min. W (121.343W) |
| Depth | 2.44 km (1.50 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=15, Nph=15, Dmin=3.1 km, Rmss=0.16 sec, Erho=0.42 km, Erzz=1.03999996 km, Gp=61 degrees |
| Event ID# | nc75247096 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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