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 6:41:11 PM (PDT) on Thursday, July 31, 2025.
The magnitude 0.4 event occurred 6 km (4 miles) WNW of Cobb, CA.
The hypocentral depth is 2 km ( 1 mile).
| Magnitude | 0.4 - duration magnitude (Md) |
| Time | Thursday, July 31, 2025 at 6:41:11 PM (PDT) Friday, August 1, 2025 at 1:41:11 (UTC) |
| Distance from |
Cobb, CA - 6 km (4 miles) WNW (285 degrees) The Geysers, CA - 7 km (5 miles) NNW (335 degrees) Kelseyville, CA - 16 km (10 miles) SSE (166 degrees) Soda Bay, CA - 18 km (11 miles) S (181 degrees) Middletown, CA - 18 km (11 miles) WNW (301 degrees) |
| Coordinates | 38 deg. 50.2 min. N (38.836N), 122 deg. 47.6 min. W (122.793W) |
| Depth | 1.72 km (1.10 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=10, Nph=10, Dmin=0.3 km, Rmss=0.02 sec, Erho=0.61 km, Erzz=0.92 km, Gp=138 degrees |
| Event ID# | nc75217697 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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