Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #2: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro earthquake occurred at 7:49:57 AM (PDT) on Monday, August 4, 2025.
The magnitude 1.7 event occurred 5 km (3 miles) SW of Antioch, CA.
The hypocentral depth is 20 km (12 miles).
| Magnitude | 1.7 - duration magnitude (Md) |
| Time | Monday, August 4, 2025 at 7:49:57 AM (PDT) Monday, August 4, 2025 at 14:49:57 (UTC) |
| Distance from |
Antioch, CA - 5 km (3 miles) SW (227 degrees) Pittsburg, CA - 7 km (4 miles) SSE (153 degrees) Clayton, CA - 8 km (5 miles) ENE (65 degrees) Bay Point, CA - 12 km (7 miles) ESE (122 degrees) Brentwood, CA - 12 km (7 miles) WNW (296 degrees) |
| Coordinates | 37 deg. 58.4 min. N (37.974N), 121 deg. 50.9 min. W (121.849W) |
| Depth | 19.82 km (12.30 miles) |
| Quality | Excellent |
| Location Quality Parameters | Nst=19, Nph=21, Dmin=8.5 km, Rmss=0.07 sec, Erho=0.28 km, Erzz=0.67 km, Gp=90 degrees |
| Event ID# | nc75219052 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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