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 9:51:58 PM (PDT) on Saturday, September 27, 2025.
The magnitude 1.7 event occurred 7 km (4 miles) SE of The Geysers, CA.
The hypocentral depth is -1 km (-0.50 miles).
| Magnitude | 1.7 - duration magnitude (Md) |
| Time | Saturday, September 27, 2025 at 9:51:58 PM (PDT) Sunday, September 28, 2025 at 4:51:58 (UTC) |
| Distance from |
The Geysers, CA - 7 km (4 miles) SE (143 degrees) Middletown, CA - 9 km (5 miles) WSW (254 degrees) Cobb, CA - 10 km (6 miles) S (174 degrees) Hidden Valley Lake, CA - 16 km (10 miles) WSW (237 degrees) Healdsburg, CA - 19 km (12 miles) NE (46 degrees) |
| Coordinates | 38 deg. 43.8 min. N (38.730N), 122 deg. 42.7 min. W (122.711W) |
| Depth | -0.76 km (-0.50 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=8, Nph=8, Dmin=3.6 km, Rmss=0.17 sec, Erho=1.11 km, Erzz=2.02999997 km, Gp=158 degrees |
| Event ID# | nc75242837 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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