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 11:16:11 AM (PDT) on Monday, October 27, 2025.
The magnitude 2.1 event occurred 30 km (19 miles) SW of Rio Dell, CA.
The hypocentral depth is 15 km (10 miles).
| Magnitude | 2.1 - duration magnitude (Md) |
| Time | Monday, October 27, 2025 at 11:16:11 AM (PDT) Monday, October 27, 2025 at 18:16:11 (UTC) |
| Distance from |
Rio Dell, CA - 30 km (19 miles) SW (225 degrees) Ferndale, CA - 31 km (19 miles) SSW (195 degrees) Hydesville, CA - 34 km (21 miles) SW (220 degrees) Fortuna, CA - 36 km (22 miles) SSW (208 degrees) Humboldt Hill, CA - 48 km (30 miles) SSW (197 degrees) |
| Coordinates | 40 deg. 18.6 min. N (40.310N), 124 deg. 21.3 min. W (124.355W) |
| Depth | 15.24 km (9.50 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=17, Nph=16, Dmin=2.6 km, Rmss=0.06 sec, Erho=1.19 km, Erzz=0.99000001 km, Gp=230 degrees |
| Event ID# | nc75255401 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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