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 6:25:44 PM (PDT) on Tuesday, September 23, 2025.
The magnitude 0.9 event occurred 26 km (16 miles) W of Boonville, CA.
The hypocentral depth is 1 km ( 1 mile).
| Magnitude | 0.9 - duration magnitude (Md) |
| Time | Tuesday, September 23, 2025 at 6:25:44 PM (PDT) Wednesday, September 24, 2025 at 1:25:44 (UTC) |
| Distance from |
Boonville, CA - 26 km (16 miles) W (268 degrees) Sea Ranch, CA - 37 km (23 miles) NNW (330 degrees) Ukiah, CA - 43 km (26 miles) WSW (248 degrees) Talmage, CA - 45 km (28 miles) WSW (251 degrees) Redwood Valley, CA - 49 km (31 miles) SW (234 degrees) |
| Coordinates | 39 deg. 0.1 min. N (39.002N), 123 deg. 39.8 min. W (123.664W) |
| Depth | 0.90 km (0.60 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=7, Nph=7, Dmin=2.9 km, Rmss=0.14 sec, Erho=1.32 km, Erzz=2.17 km, Gp=176 degrees |
| Event ID# | nc75241172 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
[
Index map ||
Big earthquake list ||
All earthquake list ||
Glossary of terms ||
Top page
]
[
Did you feel it? ||
ShakeMaps
|| Relative2Me
]
[ Data Sources ]
Special maps
Long Valley || Los Angeles || San Francisco
Data Sources
US and World - USGS/NEIC = National Earthquake Information Center
Northern California - UCB = University of California, Berkeley
Southern California - Caltech = California Institute of Technology
Nevada - UNR = University of Nevada, Reno
Offshore = West Coast & Alaska Tsunami Warning Center
...all members of the Advanced National Seismic System (ANSS)
