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 1:33:12 PM (PST) on Friday, December 19, 2025.
The magnitude 1.3 event occurred 4 km (2 miles) SW of Alamo, CA.
The hypocentral depth is 12 km ( 8 miles).
| Magnitude | 1.3 - duration magnitude (Md) |
| Time | Friday, December 19, 2025 at 1:33:12 PM (PST) Friday, December 19, 2025 at 21:33:12 (UTC) |
| Distance from |
Alamo, CA - 4 km (2 miles) SW (235 degrees) Moraga, CA - 5 km (3 miles) E (96 degrees) Saranap, CA - 6 km (4 miles) S (173 degrees) Danville, CA - 6 km (4 miles) W (279 degrees) Walnut Creek, CA - 8 km (5 miles) S (182 degrees) |
| Coordinates | 37 deg. 49.8 min. N (37.830N), 122 deg. 4.1 min. W (122.068W) |
| Depth | 12.38 km (7.70 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=5, Nph=5, Dmin=10.2 km, Rmss=0.01 sec, Erho=1.18 km, Erzz=3.78999996 km, Gp=214 degrees |
| Event ID# | nc75282906 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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