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 3:36:38 PM (PDT) on Thursday, October 23, 2025.
The magnitude 2.5 event occurred 7 km (4 miles) NNW of Lafayette, CA.
The hypocentral depth is 16 km (10 miles).
| Magnitude | 2.5 - duration magnitude (Md) |
| Time | Thursday, October 23, 2025 at 3:36:38 PM (PDT) Thursday, October 23, 2025 at 22:36:38 (UTC) |
| Distance from |
Lafayette, CA - 7 km (4 miles) NNW (336 degrees) Orinda, CA - 8 km (5 miles) NNE (18 degrees) Martinez, CA - 8 km (5 miles) S (190 degrees) Pleasant Hill, CA - 8 km (5 miles) W (268 degrees) Pacheco, CA - 8 km (5 miles) WSW (237 degrees) |
| Coordinates | 37 deg. 56.7 min. N (37.945N), 122 deg. 9.1 min. W (122.151W) |
| Depth | 15.55 km (9.70 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=80, Nph=75, Dmin=2.9 km, Rmss=0.14 sec, Erho=0.17 km, Erzz=0.270000011 km, Gp=35 degrees |
| Event ID# | nc75253591 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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