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 12:14:51 PM (PDT) on Friday, September 19, 2025.
The magnitude 1.6 event (a probable quarry explosion) occurred 6 km (4 miles) NNW of Lakeside, CA.
The hypocentral depth is -0.18 km (-0.10 miles).
| Magnitude | 1.6 - local magnitude (Ml) |
| Time | Friday, September 19, 2025 at 12:14:51 PM (PDT) Friday, September 19, 2025 at 19:14:51 (UTC) |
| Distance from |
Lakeside, CA - 6 km (4 miles) NNW (339 degrees) Winter Gardens, CA - 8 km (5 miles) N (353 degrees) Santee, CA - 8 km (5 miles) NNE (20 degrees) Bostonia, CA - 11 km (7 miles) N (356 degrees) Poway, CA - 11 km (7 miles) SE (126 degrees) |
| Coordinates | 32 deg. 54.4 min. N (32.907N), 116 deg. 56.7 min. W (116.945W) |
| Depth | -0.18 km (-0.10 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=34, Nph=34, Dmin=7.9 km, Rmss=0.29 sec, Erho=0.52 km, Erzz=31.61 km, Gp=62 degrees |
| Event ID# | ci40446322 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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