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 8:48:48 PM (PST) on Wednesday, December 3, 2025.
The magnitude 1.3 event occurred 3 km (2 miles) W of San Ramon, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 1.3 - duration magnitude (Md) |
| Time | Wednesday, December 3, 2025 at 8:48:48 PM (PST) Thursday, December 4, 2025 at 4:48:48 (UTC) |
| Distance from |
San Ramon, CA - 3 km (2 miles) W (259 degrees) Danville, CA - 5 km (3 miles) S (191 degrees) Diablo, CA - 8 km (5 miles) SW (215 degrees) Alamo, CA - 9 km (5 miles) SSE (168 degrees) Dublin, CA - 10 km (7 miles) NW (320 degrees) |
| Coordinates | 37 deg. 46.5 min. N (37.775N), 122 deg. 0.7 min. W (122.012W) |
| Depth | 6.72 km (4.20 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=4, Nph=4, Dmin=6.2 km, Rmss=0.01 sec, Erho=0.88 km, Erzz=1.80999994 km, Gp=163 degrees |
| Event ID# | nc75274076 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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