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 7:04:48 PM (PDT) on Thursday, July 31, 2025.
The magnitude 1.7 event occurred 2 km (2 miles) S of Redwood Valley, CA.
The hypocentral depth is 5 km ( 3 miles).
| Magnitude | 1.7 - duration magnitude (Md) |
| Time | Thursday, July 31, 2025 at 7:04:48 PM (PDT) Friday, August 1, 2025 at 2:04:48 (UTC) |
| Distance from |
Redwood Valley, CA - 2 km (2 miles) S (169 degrees) Ukiah, CA - 11 km (7 miles) N (5 degrees) Talmage, CA - 13 km (8 miles) NNW (348 degrees) Willits, CA - 23 km (14 miles) SE (144 degrees) Upper Lake, CA - 26 km (16 miles) WNW (290 degrees) |
| Coordinates | 39 deg. 14.6 min. N (39.244N), 123 deg. 11.9 min. W (123.199W) |
| Depth | 4.98 km (3.10 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=33, Nph=41, Dmin=6.8 km, Rmss=0.06 sec, Erho=0.12 km, Erzz=0.45 km, Gp=47 degrees |
| Event ID# | nc75217707 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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