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 6:33:09 AM (PDT) on Saturday, October 11, 2025.
The magnitude 1.2 event occurred 6 km (4 miles) S of Portola Valley, CA.
The hypocentral depth is 7 km ( 4 miles).
| Magnitude | 1.2 - duration magnitude (Md) |
| Time | Saturday, October 11, 2025 at 6:33:09 AM (PDT) Saturday, October 11, 2025 at 13:33:09 (UTC) |
| Distance from |
Portola Valley, CA - 6 km (4 miles) S (172 degrees) Los Altos Hills, CA - 10 km (6 miles) SW (235 degrees) Woodside, CA - 11 km (7 miles) SSE (167 degrees) Loyola, CA - 11 km (7 miles) WSW (258 degrees) West Menlo Park, CA - 12 km (7 miles) S (190 degrees) |
| Coordinates | 37 deg. 19.8 min. N (37.330N), 122 deg. 13.5 min. W (122.226W) |
| Depth | 7.16 km (4.40 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=8, Nph=8, Dmin=4.6 km, Rmss=0.08 sec, Erho=0.65 km, Erzz=1.25999999 km, Gp=114 degrees |
| Event ID# | nc75247836 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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