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 12:37:18 PM (PST) on Monday, December 15, 2025.
The magnitude 1.0 event occurred 2 km (1 miles) NNE (22 degrees) of The Geysers, CA.
The hypocentral depth is 0.28 km (0.20 miles).
| Magnitude | 1.0 - duration magnitude (Md) |
| Time | Monday, December 15, 2025 at 12:37:18 PM (PST) Monday, December 15, 2025 at 20:37:18 (UTC) |
| Distance from |
The Geysers, CA - 2 km (1 miles) NNE (22 degrees) Cobb, CA - 4 km (2 miles) SW (215 degrees) Middletown, CA - 12 km (8 miles) WNW (293 degrees) Hidden Valley Lake, CA - 16 km (10 miles) W (266 degrees) Lower Lake, CA - 17 km (11 miles) SW (223 degrees) |
| Coordinates | 38 deg. 47.8 min. N (38.796N), 122 deg. 44.8 min. W (122.746W) |
| Depth | 0.28 km (0.20 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=14, Nph=14, Dmin=1.3 km, Rmss=0.04 sec, Erho=0.3 km, Erzz=0.439999998 km, Gp=96 degrees |
| Event ID# | nc75280471 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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