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 8:36:27 PM (PDT) on Sunday, September 21, 2025.
The magnitude 1.6 event occurred 0 km (0 miles) N (2 degrees) of The Geysers, CA.
The hypocentral depth is 1 km (0.50 miles).
| Magnitude | 1.6 - duration magnitude (Md) |
| Time | Sunday, September 21, 2025 at 8:36:27 PM (PDT) Monday, September 22, 2025 at 3:36:27 (UTC) |
| Distance from |
The Geysers, CA - 0 km (0 miles) N (2 degrees) Cobb, CA - 6 km (3 miles) SSW (211 degrees) Middletown, CA - 13 km (8 miles) WNW (284 degrees) Hidden Valley Lake, CA - 17 km (11 miles) W (259 degrees) Lower Lake, CA - 19 km (12 miles) SW (221 degrees) |
| Coordinates | 38 deg. 46.8 min. N (38.779N), 122 deg. 45.4 min. W (122.756W) |
| Depth | 0.88 km (0.50 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=25, Nph=25, Dmin=1.2 km, Rmss=0.06 sec, Erho=0.25 km, Erzz=0.330000013 km, Gp=64 degrees |
| Event ID# | nc75240422 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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