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 8:18:35 AM (PST) on Sunday, December 28, 2025.
The magnitude 0.6 event occurred 6 km (4 miles) WNW of Cobb, CA.
The hypocentral depth is 4 km ( 2 miles).
| Magnitude | 0.6 - duration magnitude (Md) |
| Time | Sunday, December 28, 2025 at 8:18:35 AM (PST) Sunday, December 28, 2025 at 16:18:35 (UTC) |
| Distance from |
Cobb, CA - 6 km (4 miles) WNW (284 degrees) The Geysers, CA - 7 km (4 miles) NNW (337 degrees) Kelseyville, CA - 17 km (10 miles) SSE (164 degrees) Middletown, CA - 18 km (11 miles) WNW (301 degrees) Lower Lake, CA - 18 km (11 miles) WSW (241 degrees) |
| Coordinates | 38 deg. 50.1 min. N (38.834N), 122 deg. 47.3 min. W (122.788W) |
| Depth | 4.08 km (2.50 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=7, Nph=7, Dmin=1.4 km, Rmss=0.01 sec, Erho=1.81 km, Erzz=6.71000004 km, Gp=114 degrees |
| Event ID# | nc75287551 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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