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 11:09:52 PM (PST) on Wednesday, December 31, 2025.
The magnitude 1.8 event occurred 18 km (11 miles) ENE (58 degrees) of Ridgemark, CA.
The hypocentral depth is 37 km (23 miles).
| Magnitude | 1.8 - duration magnitude (Md) |
| Time | Wednesday, December 31, 2025 at 11:09:52 PM (PST) Thursday, January 1, 2026 at 7:09:52 (UTC) |
| Distance from |
Ridgemark, CA - 18 km (11 miles) ENE (58 degrees) Hollister, CA - 19 km (12 miles) ENE (72 degrees) San Juan Bautista, CA - 32 km (20 miles) E (79 degrees) Los Banos, CA - 35 km (22 miles) WSW (240 degrees) Gilroy, CA - 36 km (22 miles) ESE (109 degrees) |
| Coordinates | 36 deg. 54.0 min. N (36.901N), 121 deg. 11.4 min. W (121.190W) |
| Depth | 36.94 km (23.00 miles) |
| Quality | Poor |
| Location Quality Parameters | Nst=5, Nph=5, Dmin=29.6 km, Rmss=0.06 sec, Erho=3.44 km, Erzz=2.05999994 km, Gp=193 degrees |
| Event ID# | nc75289586 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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