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 10:06:44 AM (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 8 km ( 5 miles).
| Magnitude | 2.9 - local magnitude (Ml) |
| Time | Monday, December 8, 2025 at 10:06:44 AM (PST) Monday, December 8, 2025 at 18:06:44 (UTC) |
| Distance from |
San Ramon, CA - 4 km (2 miles) ESE (121 degrees) Dublin, CA - 7 km (4 miles) N (357 degrees) Blackhawk, CA - 7 km (4 miles) SSW (203 degrees) Diablo, CA - 8 km (5 miles) S (169 degrees) Danville, CA - 8 km (5 miles) SE (141 degrees) |
| Coordinates | 37 deg. 45.7 min. N (37.762N), 121 deg. 56.4 min. W (121.940W) |
| Depth | 8.25 km (5.10 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=48, Nph=48, Dmin=10.5 km, Rmss=1.01 sec, Erho=1.24 km, Erzz=6.07 km, Gp=42 degrees |
| Event ID# | nc75276741 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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