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 #6: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 10:58:33 AM (PDT) on Thursday, August 28, 2025.
The magnitude 0.9 event (a probable quarry explosion) occurred 9 km (5 miles) N of Big Bear City, CA.
The hypocentral depth is -2 km (-1 miles).
| Magnitude | 0.9 - local magnitude (Ml) |
| Time | Thursday, August 28, 2025 at 10:58:33 AM (PDT) Thursday, August 28, 2025 at 17:58:33 (UTC) |
| Distance from |
Big Bear City, CA - 9 km (5 miles) N (355 degrees) Big Bear Lake, CA - 12 km (7 miles) NNE (27 degrees) Lucerne Valley, CA - 16 km (10 miles) SE (138 degrees) Running Springs, CA - 28 km (17 miles) ENE (58 degrees) Lake Arrowhead, CA - 32 km (20 miles) ENE (72 degrees) |
| Coordinates | 34 deg. 20.3 min. N (34.339N), 116 deg. 51.2 min. W (116.853W) |
| Depth | -1.74 km (-1.10 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=23, Nph=24, Dmin=2.5 km, Rmss=0.22 sec, Erho=0.45 km, Erzz=31.61 km, Gp=84 degrees |
| Event ID# | ci41277512 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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