Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT REPORT ==
Southern California Seismic Network: a cooperative project of
U.S. Geological Survey, Pasadena California
Caltech Seismological Laboratory, Pasadena, California
Version #7: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 11:58:55 AM (PDT) on Friday, October 10, 2025.
The magnitude 1.1 event (a probable quarry explosion) occurred 1 km (1 miles) NW of Azusa, CA.
The hypocentral depth is 6 km ( 4 miles).
| Magnitude | 1.1 - local magnitude (Ml) |
| Time | Friday, October 10, 2025 at 11:58:55 AM (PDT) Friday, October 10, 2025 at 18:58:55 (UTC) |
| Distance from |
Azusa, CA - 1 km (1 miles) NW (304 degrees) Irwindale, CA - 4 km (2 miles) NNE (20 degrees) Citrus, CA - 4 km (2 miles) NW (317 degrees) Duarte, CA - 5 km (3 miles) E (88 degrees) Bradbury, CA - 5 km (3 miles) E (98 degrees) |
| Coordinates | 34 deg. 8.4 min. N (34.141N), 117 deg. 55.2 min. W (117.921W) |
| Depth | 6.42 km (4.00 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=11, Nph=11, Dmin=1.3 km, Rmss=0.1 sec, Erho=0.59 km, Erzz=31.61 km, Gp=153 degrees |
| Event ID# | ci41106367 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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