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 10:52:14 PM (PST) on Sunday, December 14, 2025.
The magnitude 2.1 event occurred 5 km (3 miles) ESE of San Ramon, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 2.1 - duration magnitude (Md) |
| Time | Sunday, December 14, 2025 at 10:52:14 PM (PST) Monday, December 15, 2025 at 6:52:14 (UTC) |
| Distance from |
San Ramon, CA - 5 km (3 miles) ESE (120 degrees) Dublin, CA - 6 km (4 miles) N (2 degrees) Blackhawk, CA - 7 km (4 miles) SSW (198 degrees) Diablo, CA - 9 km (5 miles) SSE (165 degrees) Danville, CA - 9 km (6 miles) SE (140 degrees) |
| Coordinates | 37 deg. 45.6 min. N (37.759N), 121 deg. 56.0 min. W (121.933W) |
| Depth | 6.50 km (4.00 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=14, Nph=12, Dmin=11.9 km, Rmss=0.04 sec, Erho=0.24 km, Erzz=0.720000029 km, Gp=104 degrees |
| Event ID# | nc75280161 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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