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 11:04:30 PM (PST) on Tuesday, December 9, 2025.
The magnitude 2.3 event occurred 10 km (6 miles) NNE (29 degrees) of Brooktrails, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 2.3 - duration magnitude (Md) |
| Time | Tuesday, December 9, 2025 at 11:04:30 PM (PST) Wednesday, December 10, 2025 at 7:04:30 (UTC) |
| Distance from |
Brooktrails, CA - 10 km (6 miles) NNE (29 degrees) Willits, CA - 13 km (8 miles) N (10 degrees) Laytonville, CA - 23 km (14 miles) SE (144 degrees) Redwood Valley, CA - 31 km (19 miles) NNW (340 degrees) Covelo, CA - 31 km (19 miles) SSW (193 degrees) |
| Coordinates | 39 deg. 31.4 min. N (39.523N), 123 deg. 19.7 min. W (123.328W) |
| Depth | 8.14 km (5.10 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=29, Nph=28, Dmin=6.0 km, Rmss=0.13 sec, Erho=0.25 km, Erzz=0.709999979 km, Gp=49 degrees |
| Event ID# | nc75277666 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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