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 event has been reviewed by a seismologist.
A micro quarry occurred at 11:31:02 AM (PST) on Wednesday, March 4, 2026.
The magnitude 1.1 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 | 1.1 - local magnitude (Ml) |
| Time | Wednesday, March 4, 2026 at 11:31:02 AM (PST) Wednesday, March 4, 2026 at 19:31:02 (UTC) |
| Distance from |
Lakeside, CA - 6 km (4 miles) NNW (345 degrees) Santee, CA - 9 km (5 miles) NNE (22 degrees) Winter Gardens, CA - 9 km (6 miles) N (357 degrees) Poway, CA - 11 km (7 miles) ESE (122 degrees) Bostonia, CA - 12 km (7 miles) N (359 degrees) |
| Coordinates | 32 deg. 54.7 min. N (32.912N), 116 deg. 56.4 min. W (116.939W) |
| Depth | -0.18 km (-0.10 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=13, Nph=13, Dmin=8.6 km, Rmss=0.26 sec, Erho=0.63 km, Erzz=31.61 km, Gp=60 degrees |
| Event ID# | ci41197263 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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