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 6:55:30 PM (PST) on Monday, December 29, 2025.
The magnitude 1.4 event occurred 2 km (1 miles) SSW of Cobb, CA.
The hypocentral depth is 1 km ( 1 mile).
| Magnitude | 1.4 - duration magnitude (Md) |
| Time | Monday, December 29, 2025 at 6:55:30 PM (PST) Tuesday, December 30, 2025 at 2:55:30 (UTC) |
| Distance from |
Cobb, CA - 2 km (1 miles) SSW (213 degrees) The Geysers, CA - 3 km (2 miles) NNE (28 degrees) Middletown, CA - 12 km (8 miles) WNW (298 degrees) Lower Lake, CA - 16 km (10 miles) SW (223 degrees) Hidden Valley Lake, CA - 16 km (10 miles) W (268 degrees) |
| Coordinates | 38 deg. 48.2 min. N (38.804N), 122 deg. 44.3 min. W (122.738W) |
| Depth | 1.10 km (0.70 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=23, Nph=23, Dmin=1.9 km, Rmss=0.05 sec, Erho=0.22 km, Erzz=0.469999999 km, Gp=63 degrees |
| Event ID# | nc75288351 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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