Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #4: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro explosion occurred at 4:31:06 PM (PDT) on Thursday, April 9, 2026.
The magnitude 1.1 event occurred 5 km (3 miles) SW of Cotati, CA.
The hypocentral depth is -0.09 km (-0.10 miles).
| Magnitude | 1.1 - duration magnitude (Md) |
| Time | Thursday, April 9, 2026 at 4:31:06 PM (PDT) Thursday, April 9, 2026 at 23:31:06 (UTC) |
| Distance from |
Cotati, CA - 5 km (3 miles) SW (228 degrees) Rohnert Park, CA - 6 km (4 miles) SW (222 degrees) Penngrove, CA - 7 km (4 miles) W (268 degrees) Petaluma, CA - 12 km (8 miles) NW (307 degrees) Sebastopol, CA - 13 km (8 miles) SSE (151 degrees) |
| Coordinates | 38 deg. 17.9 min. N (38.298N), 122 deg. 44.9 min. W (122.749W) |
| Depth | -0.09 km (-0.10 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=8, Nph=8, Dmin=3.3 km, Rmss=0.03 sec, Erho=0.3 km, Erzz=31.61 km, Gp=100 degrees |
| Event ID# | nc75341932 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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