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 11:06:38 PM (PST) on Tuesday, December 9, 2025.
The magnitude 1.5 event occurred 4 km (3 miles) NW of Redwood Valley, CA.
The hypocentral depth is 3 km ( 2 miles).
| Magnitude | 1.5 - duration magnitude (Md) |
| Time | Tuesday, December 9, 2025 at 11:06:38 PM (PST) Wednesday, December 10, 2025 at 7:06:38 (UTC) |
| Distance from |
Redwood Valley, CA - 4 km (3 miles) NW (318 degrees) Ukiah, CA - 16 km (10 miles) N (351 degrees) Willits, CA - 16 km (10 miles) SE (142 degrees) Talmage, CA - 19 km (12 miles) NNW (341 degrees) Brooktrails, CA - 21 km (13 miles) SE (143 degrees) |
| Coordinates | 39 deg. 17.7 min. N (39.294N), 123 deg. 14.3 min. W (123.238W) |
| Depth | 3.39 km (2.10 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=12, Nph=12, Dmin=3.7 km, Rmss=0.04 sec, Erho=0.33 km, Erzz=0.819999993 km, Gp=70 degrees |
| Event ID# | nc75277671 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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