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 10:33:33 AM (PST) on Wednesday, December 31, 2025.
The magnitude 1.9 event occurred 3 km (2 miles) E (94 degrees) of The Geysers, CA.
The hypocentral depth is 2 km ( 1 mile).
| Magnitude | 1.9 - duration magnitude (Md) |
| Time | Wednesday, December 31, 2025 at 10:33:33 AM (PST) Wednesday, December 31, 2025 at 18:33:33 (UTC) |
| Distance from |
The Geysers, CA - 3 km (2 miles) E (94 degrees) Cobb, CA - 5 km (3 miles) S (182 degrees) Middletown, CA - 10 km (6 miles) WNW (285 degrees) Hidden Valley Lake, CA - 15 km (9 miles) WSW (256 degrees) Lower Lake, CA - 18 km (11 miles) SW (214 degrees) |
| Coordinates | 38 deg. 46.5 min. N (38.776N), 122 deg. 43.5 min. W (122.726W) |
| Depth | 1.53 km (1.00 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=34, Nph=33, Dmin=1.3 km, Rmss=0.05 sec, Erho=0.21 km, Erzz=0.289999992 km, Gp=70 degrees |
| Event ID# | nc75289246 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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