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 9:54:54 PM (PST) on Sunday, December 14, 2025.
The magnitude 1.5 event occurred 5 km (3 miles) SE of San Ramon, CA.
The hypocentral depth is 2 km ( 1 mile).
| Magnitude | 1.5 - duration magnitude (Md) |
| Time | Sunday, December 14, 2025 at 9:54:54 PM (PST) Monday, December 15, 2025 at 5:54:54 (UTC) |
| Distance from |
San Ramon, CA - 5 km (3 miles) SE (126 degrees) Dublin, CA - 6 km (3 miles) N (6 degrees) Blackhawk, CA - 8 km (5 miles) SSW (194 degrees) Danville, CA - 10 km (6 miles) SE (141 degrees) Diablo, CA - 10 km (6 miles) SSE (165 degrees) |
| Coordinates | 37 deg. 45.1 min. N (37.752N), 121 deg. 55.8 min. W (121.929W) |
| Depth | 1.69 km (1.10 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=7, Nph=7, Dmin=12.1 km, Rmss=0.07 sec, Erho=0.62 km, Erzz=5.1500001 km, Gp=169 degrees |
| Event ID# | nc75280126 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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