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 8:22:51 PM (PDT) on Monday, October 20, 2025.
The magnitude 1.6 event occurred 12 km (7 miles) SSW of Tamalpais-Homestead Valley, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 1.6 - duration magnitude (Md) |
| Time | Monday, October 20, 2025 at 8:22:51 PM (PDT) Tuesday, October 21, 2025 at 3:22:51 (UTC) |
| Distance from |
Tamalpais-Homestead Valley, CA - 12 km (7 miles) SSW (197 degrees) Marin City, CA - 12 km (7 miles) SSW (210 degrees) Sausalito, CA - 12 km (8 miles) SW (221 degrees) Broadmoor, CA - 13 km (8 miles) NW (321 degrees) Daly City, CA - 14 km (8 miles) NW (315 degrees) |
| Coordinates | 37 deg. 46.6 min. N (37.777N), 122 deg. 34.6 min. W (122.576W) |
| Depth | 7.63 km (4.70 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=9, Nph=9, Dmin=6.8 km, Rmss=0.03 sec, Erho=0.84 km, Erzz=2.46000004 km, Gp=206 degrees |
| Event ID# | nc75252171 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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