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 5:25:44 AM (PDT) on Tuesday, October 21, 2025.
The magnitude 0.8 event occurred 3 km (2 miles) SE of The Geysers, CA.
The hypocentral depth is 0.44 km (0.30 miles).
| Magnitude | 0.8 - duration magnitude (Md) |
| Time | Tuesday, October 21, 2025 at 5:25:44 AM (PDT) Tuesday, October 21, 2025 at 12:25:44 (UTC) |
| Distance from |
The Geysers, CA - 3 km (2 miles) SE (140 degrees) Cobb, CA - 7 km (4 miles) S (189 degrees) Middletown, CA - 11 km (7 miles) W (274 degrees) Hidden Valley Lake, CA - 16 km (10 miles) WSW (250 degrees) Healdsburg, CA - 20 km (12 miles) NE (35 degrees) |
| Coordinates | 38 deg. 45.5 min. N (38.758N), 122 deg. 44.2 min. W (122.736W) |
| Depth | 0.44 km (0.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=8, Nph=8, Dmin=1.0 km, Rmss=0.03 sec, Erho=0.34 km, Erzz=0.670000017 km, Gp=128 degrees |
| Event ID# | nc75252316 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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