Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #3: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 11:02:35 AM (PDT) on Tuesday, August 12, 2025.
The magnitude 1.5 event (a probable quarry explosion) occurred 9 km (6 miles) SSE of Willits, CA.
The hypocentral depth is -1 km (-0.40 miles).
| Magnitude | 1.5 - duration magnitude (Md) |
| Time | Tuesday, August 12, 2025 at 11:02:35 AM (PDT) Tuesday, August 12, 2025 at 18:02:35 (UTC) |
| Distance from |
Willits, CA - 9 km (6 miles) SSE (156 degrees) Redwood Valley, CA - 12 km (7 miles) NW (309 degrees) Brooktrails, CA - 14 km (9 miles) SSE (153 degrees) Ukiah, CA - 22 km (14 miles) NNW (337 degrees) Talmage, CA - 25 km (16 miles) NNW (331 degrees) |
| Coordinates | 39 deg. 19.9 min. N (39.332N), 123 deg. 18.6 min. W (123.310W) |
| Depth | -0.58 km (-0.40 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=19, Nph=19, Dmin=10.2 km, Rmss=0.21 sec, Erho=0.36 km, Erzz=31.61 km, Gp=83 degrees |
| Event ID# | nc75222352 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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