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 event has been reviewed by a seismologist.
A micro earthquake occurred at 1:50:43 PM (PST) on Monday, December 8, 2025.
The magnitude 2.9 event occurred 4 km (2 miles) ESE of San Ramon, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude | 2.9 - local magnitude (Ml) |
| Time | Monday, December 8, 2025 at 1:50:43 PM (PST) Monday, December 8, 2025 at 21:50:43 (UTC) |
| Distance from |
San Ramon, CA - 4 km (2 miles) ESE (121 degrees) Dublin, CA - 7 km (4 miles) N (356 degrees) Blackhawk, CA - 7 km (4 miles) SSW (205 degrees) Diablo, CA - 8 km (5 miles) S (170 degrees) Danville, CA - 8 km (5 miles) SE (142 degrees) |
| Coordinates | 37 deg. 45.7 min. N (37.762N), 121 deg. 56.5 min. W (121.941W) |
| Depth | 9.04 km (5.60 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=105, Nph=116, Dmin=8.6 km, Rmss=0.36 sec, Erho=0.69 km, Erzz=1.714 km, Gp=23 degrees |
| Event ID# | nc75276891 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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