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 4:54:06 PM (PST) on Sunday, December 28, 2025.
The magnitude 1.4 event occurred 4 km (2 miles) SSE of San Ramon, CA.
The hypocentral depth is 1 km ( 1 mile).
| Magnitude | 1.4 - duration magnitude (Md) |
| Time | Sunday, December 28, 2025 at 4:54:06 PM (PST) Monday, December 29, 2025 at 0:54:06 (UTC) |
| Distance from |
San Ramon, CA - 4 km (2 miles) SSE (151 degrees) Dublin, CA - 6 km (4 miles) NNW (341 degrees) Danville, CA - 9 km (5 miles) SSE (154 degrees) Diablo, CA - 9 km (6 miles) S (180 degrees) Blackhawk, CA - 9 km (6 miles) SSW (209 degrees) |
| Coordinates | 37 deg. 45.0 min. N (37.751N), 121 deg. 57.4 min. W (121.957W) |
| Depth | 0.94 km (0.60 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=7, Nph=7, Dmin=9.6 km, Rmss=0.12 sec, Erho=0.71 km, Erzz=10.9899998 km, Gp=157 degrees |
| Event ID# | nc75287876 |
| 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)
