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 8:07:21 PM (PDT) on Saturday, October 4, 2025.
The magnitude 1.8 event occurred 3 km (2 miles) SE of Pacifica, CA.
The hypocentral depth is 9 km ( 6 miles).
| Magnitude | 1.8 - duration magnitude (Md) |
| Time | Saturday, October 4, 2025 at 8:07:21 PM (PDT) Sunday, October 5, 2025 at 3:07:21 (UTC) |
| Distance from |
Pacifica, CA - 3 km (2 miles) SE (137 degrees) San Bruno, CA - 6 km (4 miles) SW (227 degrees) Millbrae, CA - 7 km (4 miles) W (264 degrees) Montara, CA - 7 km (5 miles) NE (40 degrees) South San Francisco, CA - 8 km (5 miles) SW (215 degrees) |
| Coordinates | 37 deg. 35.6 min. N (37.593N), 122 deg. 27.7 min. W (122.462W) |
| Depth | 8.91 km (5.50 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=32, Nph=31, Dmin=3.6 km, Rmss=0.05 sec, Erho=0.25 km, Erzz=0.340000004 km, Gp=82 degrees |
| Event ID# | nc75244936 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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