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 1:44:08 PM (PST) on Saturday, December 13, 2025.
The magnitude 2.9 event occurred 4 km (2 miles) ESE of San Ramon, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 2.9 - duration magnitude (Md) |
| Time | Saturday, December 13, 2025 at 1:44:08 PM (PST) Saturday, December 13, 2025 at 21:44:08 (UTC) |
| Distance from |
San Ramon, CA - 4 km (2 miles) ESE (119 degrees) Dublin, CA - 7 km (4 miles) N (358 degrees) Blackhawk, CA - 7 km (4 miles) SSW (203 degrees) Diablo, CA - 8 km (5 miles) SSE (168 degrees) Danville, CA - 9 km (5 miles) SE (140 degrees) |
| Coordinates | 37 deg. 45.8 min. N (37.763N), 121 deg. 56.3 min. W (121.938W) |
| Depth | 7.91 km (4.90 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=34, Nph=32, Dmin=11.5 km, Rmss=0.07 sec, Erho=0.17 km, Erzz=0.419999987 km, Gp=49 degrees |
| Event ID# | nc75279301 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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