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 2:01:44 AM (PDT) on Tuesday, September 2, 2025.
The magnitude 1.7 event occurred 9 km (6 miles) SSE of Portola Valley, CA.
The hypocentral depth is 5 km ( 3 miles).
| Magnitude | 1.7 - duration magnitude (Md) |
| Time | Tuesday, September 2, 2025 at 2:01:44 AM (PDT) Tuesday, September 2, 2025 at 9:01:44 (UTC) |
| Distance from |
Portola Valley, CA - 9 km (6 miles) SSE (159 degrees) Los Altos Hills, CA - 9 km (6 miles) SW (215 degrees) Loyola, CA - 10 km (6 miles) WSW (242 degrees) Los Altos, CA - 11 km (7 miles) SW (222 degrees) Stanford, CA - 13 km (8 miles) SSW (193 degrees) |
| Coordinates | 37 deg. 18.6 min. N (37.310N), 122 deg. 11.9 min. W (122.199W) |
| Depth | 4.55 km (2.80 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=13, Nph=13, Dmin=3.0 km, Rmss=0.17 sec, Erho=0.46 km, Erzz=0.709999979 km, Gp=69 degrees |
| Event ID# | nc75231957 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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