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 9:35:31 PM (PDT) on Friday, September 4, 2026.
The magnitude 1.7 event occurred 4 km (2 miles) SW of Brentwood, CA.
The hypocentral depth is 14 km ( 9 miles).
| Magnitude | 1.7 - duration magnitude (Md) |
| Time | Friday, September 4, 2026 at 9:35:31 PM (PDT) Saturday, September 5, 2026 at 4:35:31 (UTC) |
| Distance from |
Brentwood, CA - 4 km (2 miles) SW (215 degrees) Knightsen, CA - 10 km (6 miles) SW (223 degrees) Byron, CA - 10 km (6 miles) WNW (291 degrees) Oakley, CA - 11 km (7 miles) SSW (197 degrees) Antioch, CA - 13 km (8 miles) SSE (157 degrees) |
| Coordinates | 37 deg. 54.1 min. N (37.901N), 121 deg. 44.9 min. W (121.749W) |
| Depth | 14.40 km (8.90 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=13, Nph=12, Dmin=3.7 km, Rmss=0.04 sec, Erho=0.67 km, Erzz=1 km, Gp=194 degrees |
| Event ID# | nc75430032 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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