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 11:50:24 AM (PDT) on Wednesday, September 3, 2025.
The magnitude 1.2 event (a probable quarry explosion) occurred 9 km (6 miles) NNW of Big Bear City, CA.
The hypocentral depth is 0.23 km (0.10 miles).
| Magnitude | 1.2 - local magnitude (Ml) |
| Time | Wednesday, September 3, 2025 at 11:50:24 AM (PDT) Wednesday, September 3, 2025 at 18:50:24 (UTC) |
| Distance from |
Big Bear City, CA - 9 km (6 miles) NNW (340 degrees) Big Bear Lake, CA - 11 km (7 miles) NNE (16 degrees) Lucerne Valley, CA - 14 km (9 miles) SE (145 degrees) Running Springs, CA - 26 km (16 miles) NE (55 degrees) Lake Arrowhead, CA - 30 km (19 miles) ENE (70 degrees) |
| Coordinates | 34 deg. 20.3 min. N (34.339N), 116 deg. 52.7 min. W (116.879W) |
| Depth | 0.23 km (0.10 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=24, Nph=34, Dmin=4.8 km, Rmss=0.16 sec, Erho=0.22 km, Erzz=0.35 km, Gp=47 degrees |
| Event ID# | ci41282432 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
[
Index map ||
Big earthquake list ||
All earthquake list ||
Glossary of terms ||
Top page
]
[
Did you feel it? ||
ShakeMaps
|| Relative2Me
]
[ Data Sources ]
Special maps
Long Valley || Los Angeles || San Francisco
Data Sources
US and World - USGS/NEIC = National Earthquake Information Center
Northern California - UCB = University of California, Berkeley
Southern California - Caltech = California Institute of Technology
Nevada - UNR = University of Nevada, Reno
Offshore = West Coast & Alaska Tsunami Warning Center
...all members of the Advanced National Seismic System (ANSS)
