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 9:08:24 AM (PST) on Monday, December 15, 2025.
The magnitude 0.8 event occurred 3 km (2 miles) WSW of Cobb, CA.
The hypocentral depth is 4 km ( 3 miles).
| Magnitude | 0.8 - duration magnitude (Md) |
| Time | Monday, December 15, 2025 at 9:08:24 AM (PST) Monday, December 15, 2025 at 17:08:24 (UTC) |
| Distance from |
Cobb, CA - 3 km (2 miles) WSW (254 degrees) The Geysers, CA - 4 km (3 miles) N (4 degrees) Middletown, CA - 14 km (9 miles) WNW (300 degrees) Lower Lake, CA - 16 km (10 miles) SW (229 degrees) Hidden Valley Lake, CA - 17 km (10 miles) W (273 degrees) |
| Coordinates | 38 deg. 48.9 min. N (38.815N), 122 deg. 45.2 min. W (122.753W) |
| Depth | 4.24 km (2.60 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=11, Nph=11, Dmin=2.2 km, Rmss=0.08 sec, Erho=0.69 km, Erzz=1.15999997 km, Gp=147 degrees |
| Event ID# | nc75280381 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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