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 5:33:05 PM (PDT) on Monday, October 27, 2025.
The magnitude 2.5 event occurred 9 km (6 miles) NE (38 degrees) of Healdsburg, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 2.5 - duration magnitude (Md) |
| Time | Monday, October 27, 2025 at 5:33:05 PM (PDT) Tuesday, October 28, 2025 at 0:33:05 (UTC) |
| Distance from |
Healdsburg, CA - 9 km (6 miles) NE (38 degrees) The Geysers, CA - 12 km (8 miles) SSW (200 degrees) Windsor, CA - 14 km (9 miles) N (4 degrees) Larkfield-Wikiup, CA - 18 km (11 miles) NNW (345 degrees) Cobb, CA - 18 km (11 miles) SSW (203 degrees) |
| Coordinates | 38 deg. 40.4 min. N (38.673N), 122 deg. 48.3 min. W (122.805W) |
| Depth | 6.94 km (4.30 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=75, Nph=73, Dmin=5.9 km, Rmss=0.09 sec, Erho=0.15 km, Erzz=0.419999987 km, Gp=33 degrees |
| Event ID# | nc75255476 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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