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 5:23:35 AM (PDT) on Thursday, September 4, 2025.
The magnitude 1.2 event occurred 3 km (2 miles) NNE (25 degrees) of Larkfield-Wikiup, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude | 1.2 - duration magnitude (Md) |
| Time | Thursday, September 4, 2025 at 5:23:35 AM (PDT) Thursday, September 4, 2025 at 12:23:35 (UTC) |
| Distance from |
Larkfield-Wikiup, CA - 3 km (2 miles) NNE (25 degrees) Windsor, CA - 7 km (4 miles) E (101 degrees) Santa Rosa, CA - 10 km (6 miles) NNW (343 degrees) Roseland, CA - 13 km (8 miles) N (356 degrees) Healdsburg, CA - 14 km (9 miles) SE (126 degrees) |
| Coordinates | 38 deg. 32.1 min. N (38.535N), 122 deg. 44.3 min. W (122.738W) |
| Depth | 8.87 km (5.50 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=56, Nph=61, Dmin=5.9 km, Rmss=0.09 sec, Erho=0.13 km, Erzz=0.32 km, Gp=36 degrees |
| Event ID# | nc75233032 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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