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 4:38:16 PM (PDT) on Thursday, September 18, 2025.
The magnitude 1.1 event occurred 9 km (6 miles) NNW of Calistoga, CA.
The hypocentral depth is 1 km ( 1 mile).
| Magnitude | 1.1 - duration magnitude (Md) |
| Time | Thursday, September 18, 2025 at 4:38:16 PM (PDT) Thursday, September 18, 2025 at 23:38:16 (UTC) |
| Distance from |
Calistoga, CA - 9 km (6 miles) NNW (344 degrees) Middletown, CA - 10 km (6 miles) S (177 degrees) Angwin, CA - 17 km (10 miles) NW (304 degrees) Hidden Valley Lake, CA - 17 km (11 miles) SSW (195 degrees) The Geysers, CA - 18 km (11 miles) SE (136 degrees) |
| Coordinates | 38 deg. 39.6 min. N (38.659N), 122 deg. 36.5 min. W (122.609W) |
| Depth | 1.37 km (0.90 miles) |
| Quality | Poor |
| Location Quality Parameters | Nst=5, Nph=5, Dmin=21.5 km, Rmss=0.05 sec, Erho=2.83 km, Erzz=8.88000011 km, Gp=177 degrees |
| Event ID# | nc75239317 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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