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 3:16:18 AM (PDT) on Thursday, July 31, 2025.
The magnitude 1.4 event occurred 4 km (2 miles) N (7 degrees) of Larkfield-Wikiup, CA.
The hypocentral depth is 4 km ( 3 miles).
| Magnitude | 1.4 - duration magnitude (Md) |
| Time | Thursday, July 31, 2025 at 3:16:18 AM (PDT) Thursday, July 31, 2025 at 10:16:18 (UTC) |
| Distance from |
Larkfield-Wikiup, CA - 4 km (2 miles) N (7 degrees) Windsor, CA - 6 km (4 miles) E (88 degrees) Santa Rosa, CA - 12 km (7 miles) NNW (342 degrees) Healdsburg, CA - 13 km (8 miles) ESE (122 degrees) Roseland, CA - 14 km (9 miles) N (354 degrees) |
| Coordinates | 38 deg. 32.9 min. N (38.549N), 122 deg. 44.7 min. W (122.746W) |
| Depth | 4.24 km (2.60 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=51, Nph=55, Dmin=5.2 km, Rmss=0.09 sec, Erho=0.13 km, Erzz=0.6 km, Gp=38 degrees |
| Event ID# | nc75217367 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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