Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #3: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 2:15:02 PM (PDT) on Thursday, September 4, 2025.
The magnitude 1.8 event (a probable quarry explosion) occurred 6 km (4 miles) ENE (77 degrees) of Bonadelle Ranchos-Madera Ranch, CA.
The hypocentral depth is -0.50 km (-0.30 miles).
| Magnitude | 1.8 - duration magnitude (Md) |
| Time | Thursday, September 4, 2025 at 2:15:02 PM (PDT) Thursday, September 4, 2025 at 21:15:02 (UTC) |
| Distance from |
Bonadelle Ranchos-Madera Ranch, CA - 6 km (4 miles) ENE (77 degrees) Parksdale, CA - 20 km (12 miles) ENE (74 degrees) Clovis, CA - 21 km (13 miles) NNW (334 degrees) Yosemite Lakes, CA - 22 km (14 miles) S (188 degrees) Madera, CA - 23 km (14 miles) E (80 degrees) |
| Coordinates | 36 deg. 59.8 min. N (36.997N), 119 deg. 48.4 min. W (119.806W) |
| Depth | -0.50 km (-0.30 miles) |
| Quality | Poor |
| Location Quality Parameters | Nst=8, Nph=8, Dmin=8.8 km, Rmss=0.02 sec, Erho=0.69 km, Erzz=31.61 km, Gp=193 degrees |
| Event ID# | nc75233192 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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