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 4:21:31 AM (PST) on Wednesday, December 31, 2025.
The magnitude 2.3 event occurred 2 km (1 miles) N of The Geysers, CA.
The hypocentral depth is 1 km (0.50 miles).
| Magnitude | 2.3 - duration magnitude (Md) |
| Time | Wednesday, December 31, 2025 at 4:21:31 AM (PST) Wednesday, December 31, 2025 at 12:21:31 (UTC) |
| Distance from |
The Geysers, CA - 2 km (1 miles) N (360 degrees) Cobb, CA - 4 km (3 miles) SW (220 degrees) Middletown, CA - 13 km (8 miles) WNW (290 degrees) Hidden Valley Lake, CA - 17 km (11 miles) W (264 degrees) Lower Lake, CA - 18 km (11 miles) SW (224 degrees) |
| Coordinates | 38 deg. 47.5 min. N (38.792N), 122 deg. 45.4 min. W (122.757W) |
| Depth | 0.73 km (0.50 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=43, Nph=42, Dmin=1.1 km, Rmss=0.05 sec, Erho=0.16 km, Erzz=0.25 km, Gp=49 degrees |
| Event ID# | nc75288966 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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