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 11:38:50 PM (PST) on Friday, December 12, 2025.
The magnitude 1.2 event occurred 9 km (6 miles) E (83 degrees) of Healdsburg, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 1.2 - duration magnitude (Md) |
| Time | Friday, December 12, 2025 at 11:38:50 PM (PST) Saturday, December 13, 2025 at 7:38:50 (UTC) |
| Distance from |
Healdsburg, CA - 9 km (6 miles) E (83 degrees) Windsor, CA - 9 km (6 miles) NNE (30 degrees) Larkfield-Wikiup, CA - 12 km (7 miles) N (355 degrees) Calistoga, CA - 17 km (10 miles) WNW (286 degrees) The Geysers, CA - 17 km (11 miles) S (182 degrees) |
| Coordinates | 38 deg. 37.2 min. N (38.620N), 122 deg. 45.7 min. W (122.762W) |
| Depth | 7.72 km (4.80 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=11, Nph=11, Dmin=6.9 km, Rmss=0.07 sec, Erho=0.7 km, Erzz=1.38999999 km, Gp=124 degrees |
| Event ID# | nc75279026 |
| 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)
