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 5:37:52 AM (PST) on Monday, December 8, 2025.
The magnitude 2.7 event occurred 4 km (3 miles) SE of San Ramon, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 2.7 - local magnitude (Ml) |
| Time | Monday, December 8, 2025 at 5:37:52 AM (PST) Monday, December 8, 2025 at 13:37:52 (UTC) |
| Distance from |
San Ramon, CA - 4 km (3 miles) SE (135 degrees) Dublin, CA - 6 km (3 miles) N (354 degrees) Blackhawk, CA - 8 km (5 miles) SSW (202 degrees) Diablo, CA - 9 km (6 miles) S (172 degrees) Danville, CA - 9 km (6 miles) SSE (147 degrees) |
| Coordinates | 37 deg. 45.1 min. N (37.751N), 121 deg. 56.6 min. W (121.943W) |
| Depth | 8.36 km (5.20 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=56, Nph=58, Dmin=11.6 km, Rmss=0.58 sec, Erho=1.21 km, Erzz=4.666 km, Gp=27 degrees |
| Event ID# | nc75276561 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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