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 2:16:23 PM (PDT) on Thursday, October 23, 2025.
The magnitude 2.3 event occurred 7 km (5 miles) NNW of Lafayette, CA.
The hypocentral depth is 15 km ( 9 miles).
| Magnitude | 2.3 - duration magnitude (Md) |
| Time | Thursday, October 23, 2025 at 2:16:23 PM (PDT) Thursday, October 23, 2025 at 21:16:23 (UTC) |
| Distance from |
Lafayette, CA - 7 km (5 miles) NNW (333 degrees) Orinda, CA - 8 km (5 miles) NNE (15 degrees) Pleasant Hill, CA - 8 km (5 miles) W (268 degrees) Pacheco, CA - 8 km (5 miles) WSW (239 degrees) Martinez, CA - 9 km (5 miles) SSW (193 degrees) |
| Coordinates | 37 deg. 56.7 min. N (37.945N), 122 deg. 9.4 min. W (122.157W) |
| Depth | 14.74 km (9.20 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=71, Nph=69, Dmin=2.9 km, Rmss=0.12 sec, Erho=0.19 km, Erzz=0.330000013 km, Gp=38 degrees |
| Event ID# | nc75253501 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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