Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #5: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 8:24:42 PM (PDT) on Monday, August 4, 2025.
The magnitude 1.8 event occurred 43 km (27 miles) SW of Ferndale, CA.
The hypocentral depth is 10 km ( 6 miles).
| Magnitude | 1.8 - duration magnitude (Md) |
| Time | Monday, August 4, 2025 at 8:24:42 PM (PDT) Tuesday, August 5, 2025 at 3:24:42 (UTC) |
| Distance from |
Ferndale, CA - 43 km (27 miles) SW (225 degrees) Rio Dell, CA - 49 km (31 miles) WSW (243 degrees) Fortuna, CA - 52 km (32 miles) SW (230 degrees) Hydesville, CA - 53 km (33 miles) WSW (239 degrees) Humboldt Hill, CA - 60 km (37 miles) SW (218 degrees) |
| Coordinates | 40 deg. 18.0 min. N (40.300N), 124 deg. 37.6 min. W (124.627W) |
| Depth | 9.94 km (6.20 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=32, Nph=40, Dmin=24.2 km, Rmss=0.22 sec, Erho=0.53 km, Erzz=0.79 km, Gp=276 degrees |
| Event ID# | nc75219347 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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