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 4:08:09 PM (PST) on Tuesday, December 9, 2025.
The magnitude 1.0 event occurred 2 km (1 miles) ENE (68 degrees) of The Geysers, CA.
The hypocentral depth is 0.39 km (0.20 miles).
| Magnitude | 1.0 - duration magnitude (Md) |
| Time | Tuesday, December 9, 2025 at 4:08:09 PM (PST) Wednesday, December 10, 2025 at 0:08:09 (UTC) |
| Distance from |
The Geysers, CA - 2 km (1 miles) ENE (68 degrees) Cobb, CA - 5 km (3 miles) SSW (198 degrees) Middletown, CA - 11 km (7 miles) WNW (287 degrees) Hidden Valley Lake, CA - 16 km (10 miles) W (260 degrees) Lower Lake, CA - 18 km (11 miles) SW (218 degrees) |
| Coordinates | 38 deg. 47.0 min. N (38.783N), 122 deg. 44.4 min. W (122.740W) |
| Depth | 0.39 km (0.20 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=7, Nph=6, Dmin=0.3 km, Rmss=0.01 sec, Erho=0.35 km, Erzz=0.620000005 km, Gp=113 degrees |
| Event ID# | nc75277526 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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