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 2:08:52 AM (PDT) on Thursday, October 16, 2025.
The magnitude 1.4 event occurred 7 km (4 miles) SSE of Portola Valley, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 1.4 - duration magnitude (Md) |
| Time | Thursday, October 16, 2025 at 2:08:52 AM (PDT) Thursday, October 16, 2025 at 9:08:52 (UTC) |
| Distance from |
Portola Valley, CA - 7 km (4 miles) SSE (154 degrees) Los Altos Hills, CA - 8 km (5 miles) SW (224 degrees) Loyola, CA - 9 km (6 miles) WSW (253 degrees) Los Altos, CA - 10 km (6 miles) SW (230 degrees) Stanford, CA - 11 km (7 miles) SSW (196 degrees) |
| Coordinates | 37 deg. 19.6 min. N (37.327N), 122 deg. 12.1 min. W (122.201W) |
| Depth | 8.33 km (5.20 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=11, Nph=10, Dmin=3.8 km, Rmss=0.09 sec, Erho=0.52 km, Erzz=0.670000017 km, Gp=96 degrees |
| Event ID# | nc75250071 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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