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 0:57:15 AM (PDT) on Friday, September 12, 2025.
The magnitude 1.9 event occurred 10 km (6 miles) NNE (14 degrees) of Angwin, CA.
The hypocentral depth is 2 km ( 1 mile).
| Magnitude | 1.9 - duration magnitude (Md) |
| Time | Friday, September 12, 2025 at 0:57:15 AM (PDT) Friday, September 12, 2025 at 7:57:15 (UTC) |
| Distance from |
Angwin, CA - 10 km (6 miles) NNE (14 degrees) Calistoga, CA - 17 km (10 miles) NE (55 degrees) Saint Helena, CA - 18 km (11 miles) NNE (13 degrees) Middletown, CA - 19 km (12 miles) ESE (121 degrees) Hidden Valley Lake, CA - 20 km (12 miles) SE (144 degrees) |
| Coordinates | 38 deg. 39.8 min. N (38.663N), 122 deg. 25.3 min. W (122.422W) |
| Depth | 1.70 km (1.10 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=11, Nph=10, Dmin=16.8 km, Rmss=0.12 sec, Erho=0.4 km, Erzz=11.1000004 km, Gp=87 degrees |
| Event ID# | nc75236832 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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