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 #5: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro quarry occurred at 11:16:36 AM (PDT) on Friday, August 15, 2025.
The magnitude 1.6 event (a probable quarry explosion) occurred 1 km (1 miles) ENE (75 degrees) of Baldwin Park, CA.
The hypocentral depth is 9 km ( 5 miles).
| Magnitude | 1.6 - local magnitude (Ml) |
| Time | Friday, August 15, 2025 at 11:16:36 AM (PDT) Friday, August 15, 2025 at 18:16:36 (UTC) |
| Distance from |
Baldwin Park, CA - 1 km (1 miles) ENE (75 degrees) Irwindale, CA - 3 km (2 miles) SW (215 degrees) West Puente Valley, CA - 4 km (3 miles) NNE (21 degrees) Valinda, CA - 5 km (3 miles) N (351 degrees) West Covina, CA - 5 km (3 miles) NW (318 degrees) |
| Coordinates | 34 deg. 5.2 min. N (34.087N), 117 deg. 57.1 min. W (117.952W) |
| Depth | 8.55 km (5.30 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=17, Nph=22, Dmin=6.2 km, Rmss=0.27 sec, Erho=0.6 km, Erzz=1.13 km, Gp=53 degrees |
| Event ID# | ci40399522 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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