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 1:22:41 PM (PDT) on Monday, August 17, 2026.
The magnitude 1.7 event (a probable quarry explosion) occurred 7 km (4 miles) ENE (71 degrees) of Bonadelle Ranchos-Madera Ranch, CA.
The hypocentral depth is -0.39 km (-0.20 miles).
| Magnitude | 1.7 - duration magnitude (Md) |
| Time | Monday, August 17, 2026 at 1:22:41 PM (PDT) Monday, August 17, 2026 at 20:22:41 (UTC) |
| Distance from |
Bonadelle Ranchos-Madera Ranch, CA - 7 km (4 miles) ENE (71 degrees) Parksdale, CA - 21 km (13 miles) ENE (72 degrees) Yosemite Lakes, CA - 21 km (13 miles) S (186 degrees) Clovis, CA - 22 km (14 miles) NNW (337 degrees) Madera Acres, CA - 24 km (15 miles) E (94 degrees) |
| Coordinates | 37 deg. 0.3 min. N (37.006N), 119 deg. 47.9 min. W (119.799W) |
| Depth | -0.39 km (-0.20 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=9, Nph=9, Dmin=8.2 km, Rmss=0.07 sec, Erho=0.64 km, Erzz=31.61 km, Gp=98 degrees |
| Event ID# | nc75420232 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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