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 3:27:37 PM (PST) on Tuesday, December 30, 2025.
The magnitude 2.1 event occurred 3 km (2 miles) W of Cobb, CA.
The hypocentral depth is 2 km ( 1 mile).
| Magnitude | 2.1 - duration magnitude (Md) |
| Time | Tuesday, December 30, 2025 at 3:27:37 PM (PST) Tuesday, December 30, 2025 at 23:27:37 (UTC) |
| Distance from |
Cobb, CA - 3 km (2 miles) W (266 degrees) The Geysers, CA - 5 km (3 miles) N (353 degrees) Middletown, CA - 15 km (9 miles) WNW (300 degrees) Lower Lake, CA - 17 km (10 miles) SW (233 degrees) Hidden Valley Lake, CA - 18 km (11 miles) W (274 degrees) |
| Coordinates | 38 deg. 49.2 min. N (38.820N), 122 deg. 45.8 min. W (122.763W) |
| Depth | 1.65 km (1.00 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=47, Nph=45, Dmin=1.3 km, Rmss=0.05 sec, Erho=0.16 km, Erzz=0.239999995 km, Gp=55 degrees |
| Event ID# | nc75288746 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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