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 3:23:20 AM (PST) on Thursday, December 11, 2025.
The magnitude 1.0 event occurred 13 km (8 miles) E (86 degrees) of Saint Helena, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 1.0 - duration magnitude (Md) |
| Time | Thursday, December 11, 2025 at 3:23:20 AM (PST) Thursday, December 11, 2025 at 11:23:20 (UTC) |
| Distance from |
Saint Helena, CA - 13 km (8 miles) E (86 degrees) Angwin, CA - 13 km (8 miles) ESE (121 degrees) Yountville, CA - 13 km (8 miles) NNE (17 degrees) Kenwood, CA - 23 km (14 miles) ENE (61 degrees) Calistoga, CA - 24 km (15 miles) ESE (108 degrees) |
| Coordinates | 38 deg. 30.8 min. N (38.513N), 122 deg. 19.1 min. W (122.318W) |
| Depth | 7.32 km (4.50 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=6, Nph=6, Dmin=8.7 km, Rmss=0.07 sec, Erho=1.08 km, Erzz=1.54999995 km, Gp=113 degrees |
| Event ID# | nc75278226 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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