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 1:01:55 PM (PST) on Monday, December 22, 2025.
The magnitude 1.5 event occurred 4 km (2 miles) WSW of Cobb, CA.
The hypocentral depth is 2 km ( 1 mile).
| Magnitude | 1.5 - duration magnitude (Md) |
| Time | Monday, December 22, 2025 at 1:01:55 PM (PST) Monday, December 22, 2025 at 21:01:55 (UTC) |
| Distance from |
Cobb, CA - 4 km (2 miles) WSW (258 degrees) The Geysers, CA - 4 km (3 miles) N (352 degrees) Middletown, CA - 15 km (9 miles) WNW (299 degrees) Lower Lake, CA - 17 km (11 miles) SW (232 degrees) Hidden Valley Lake, CA - 18 km (11 miles) W (273 degrees) |
| Coordinates | 38 deg. 48.9 min. N (38.816N), 122 deg. 45.8 min. W (122.763W) |
| Depth | 1.69 km (1.10 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=29, Nph=29, Dmin=1.5 km, Rmss=0.03 sec, Erho=0.22 km, Erzz=0.310000002 km, Gp=49 degrees |
| Event ID# | nc75284931 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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