Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #4: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 11:50:42 AM (PDT) on Tuesday, August 5, 2025.
The magnitude 1.4 event (a probable quarry explosion) occurred 6 km (4 miles) ESE of Santa Venetia, CA.
The hypocentral depth is -0.02 km (-0.00 miles).
| Magnitude | 1.4 - duration magnitude (Md) |
| Time | Tuesday, August 5, 2025 at 11:50:42 AM (PDT) Tuesday, August 5, 2025 at 18:50:42 (UTC) |
| Distance from |
Santa Venetia, CA - 6 km (4 miles) ESE (102 degrees) San Rafael, CA - 7 km (4 miles) ENE (78 degrees) North Richmond, CA - 8 km (5 miles) WNW (292 degrees) Ross, CA - 9 km (6 miles) ENE (74 degrees) Corte Madera, CA - 9 km (6 miles) NE (44 degrees) |
| Coordinates | 37 deg. 59.2 min. N (37.986N), 122 deg. 27.2 min. W (122.453W) |
| Depth | -0.02 km (-0.00 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=30, Nph=30, Dmin=2.6 km, Rmss=0.14 sec, Erho=0.24 km, Erzz=31.61 km, Gp=36 degrees |
| Event ID# | nc75219662 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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