Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #0: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro earthquake occurred at 7:15:55 AM (PDT) on Thursday, August 21, 2025.
The magnitude 1.7 event occurred 6 km (4 miles) ENE (71 degrees) of Petaluma, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 1.7 - duration magnitude (Md) |
| Time | Thursday, August 21, 2025 at 7:15:55 AM (PDT) Thursday, August 21, 2025 at 14:15:55 (UTC) |
| Distance from |
Petaluma, CA - 6 km (4 miles) ENE (71 degrees) Temelec, CA - 7 km (4 miles) WSW (255 degrees) El Verano, CA - 8 km (5 miles) SW (232 degrees) Penngrove, CA - 10 km (6 miles) ESE (122 degrees) Boyes Hot Springs, CA - 10 km (6 miles) SW (227 degrees) |
| Coordinates | 38 deg. 15.0 min. N (38.251N), 122 deg. 34.1 min. W (122.568W) |
| Depth | 6.50 km (4.00 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=27, Nph=27, Dmin=1.8 km, Rmss=0.11 sec, Erho=0.23 km, Erzz=0.620000005 km, Gp=38 degrees |
| Event ID# | nc75226732 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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