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 7:26:21 AM (PST) on Sunday, December 7, 2025.
The magnitude 1.6 event occurred 12 km (8 miles) SE of Middletown, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 1.6 - duration magnitude (Md) |
| Time | Sunday, December 7, 2025 at 7:26:21 AM (PST) Sunday, December 7, 2025 at 15:26:21 (UTC) |
| Distance from |
Middletown, CA - 12 km (8 miles) SE (126 degrees) Angwin, CA - 13 km (8 miles) NNW (341 degrees) Calistoga, CA - 14 km (9 miles) NNE (30 degrees) Hidden Valley Lake, CA - 14 km (9 miles) SSE (159 degrees) Saint Helena, CA - 20 km (13 miles) N (353 degrees) |
| Coordinates | 38 deg. 41.2 min. N (38.687N), 122 deg. 29.9 min. W (122.498W) |
| Depth | 6.75 km (4.20 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=13, Nph=13, Dmin=7.8 km, Rmss=0.07 sec, Erho=0.31 km, Erzz=1.10000002 km, Gp=72 degrees |
| Event ID# | nc75275816 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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