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 10:42:56 PM (PST) on Tuesday, December 9, 2025.
The magnitude 1.1 event occurred 5 km (3 miles) WNW of The Geysers, CA.
The hypocentral depth is 3 km ( 2 miles).
| Magnitude | 1.1 - duration magnitude (Md) |
| Time | Tuesday, December 9, 2025 at 10:42:56 PM (PST) Wednesday, December 10, 2025 at 6:42:56 (UTC) |
| Distance from |
The Geysers, CA - 5 km (3 miles) WNW (291 degrees) Cobb, CA - 8 km (5 miles) WSW (248 degrees) Cloverdale, CA - 18 km (11 miles) E (94 degrees) Middletown, CA - 18 km (11 miles) WNW (285 degrees) Healdsburg, CA - 21 km (13 miles) NNE (14 degrees) |
| Coordinates | 38 deg. 47.6 min. N (38.794N), 122 deg. 48.7 min. W (122.811W) |
| Depth | 3.11 km (1.90 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=17, Nph=17, Dmin=0.9 km, Rmss=0.02 sec, Erho=0.38 km, Erzz=0.620000005 km, Gp=167 degrees |
| Event ID# | nc75277656 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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