Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #2: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 7:53:41 PM (PDT) on Saturday, September 27, 2025.
The magnitude 1.1 event occurred 28 km (18 miles) SSW of Rio Dell, CA.
The hypocentral depth is 12 km ( 8 miles).
| Magnitude | 1.1 - duration magnitude (Md) |
| Time | Saturday, September 27, 2025 at 7:53:41 PM (PDT) Sunday, September 28, 2025 at 2:53:41 (UTC) |
| Distance from |
Rio Dell, CA - 28 km (18 miles) SSW (207 degrees) Ferndale, CA - 34 km (21 miles) S (179 degrees) Hydesville, CA - 34 km (21 miles) SSW (204 degrees) Fortuna, CA - 37 km (23 miles) SSW (193 degrees) Redway, CA - 41 km (25 miles) WNW (295 degrees) |
| Coordinates | 40 deg. 16.4 min. N (40.273N), 124 deg. 15.6 min. W (124.260W) |
| Depth | 12.22 km (7.60 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=27, Nph=44, Dmin=1.8 km, Rmss=0.10 sec, Erho=0.23 km, Erzz=0.3 km, Gp=87 degrees |
| Event ID# | nc75242822 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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