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 1:31:08 AM (PDT) on Saturday, October 11, 2025.
The magnitude 1.6 event occurred 9 km (6 miles) SSW of Brentwood, CA.
The hypocentral depth is 17 km (10 miles).
| Magnitude | 1.6 - duration magnitude (Md) |
| Time | Saturday, October 11, 2025 at 1:31:08 AM (PDT) Saturday, October 11, 2025 at 8:31:08 (UTC) |
| Distance from |
Brentwood, CA - 9 km (6 miles) SSW (206 degrees) Byron, CA - 12 km (7 miles) W (261 degrees) Blackhawk, CA - 12 km (8 miles) ENE (74 degrees) Diablo, CA - 16 km (10 miles) E (84 degrees) Knightsen, CA - 16 km (10 miles) SW (215 degrees) |
| Coordinates | 37 deg. 51.1 min. N (37.851N), 121 deg. 46.3 min. W (121.772W) |
| Depth | 16.85 km (10.50 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=13, Nph=12, Dmin=2.9 km, Rmss=0.06 sec, Erho=0.6 km, Erzz=0.980000019 km, Gp=86 degrees |
| Event ID# | nc75247751 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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