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 5:05:55 AM (PDT) on Friday, October 31, 2025.
The magnitude 2.1 event occurred 4 km (2 miles) W of Cobb, CA.
The hypocentral depth is 2 km ( 1 mile).
| Magnitude | 2.1 - duration magnitude (Md) |
| Time | Friday, October 31, 2025 at 5:05:55 AM (PDT) Friday, October 31, 2025 at 12:05:55 (UTC) |
| Distance from |
Cobb, CA - 4 km (2 miles) W (271 degrees) The Geysers, CA - 5 km (3 miles) N (352 degrees) Middletown, CA - 15 km (9 miles) WNW (301 degrees) Lower Lake, CA - 17 km (10 miles) SW (234 degrees) Kelseyville, CA - 18 km (11 miles) SSE (159 degrees) |
| Coordinates | 38 deg. 49.4 min. N (38.823N), 122 deg. 45.9 min. W (122.765W) |
| Depth | 1.65 km (1.00 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=40, Nph=38, Dmin=1.0 km, Rmss=0.04 sec, Erho=0.17 km, Erzz=0.25999999 km, Gp=57 degrees |
| Event ID# | nc75257071 |
| 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)
