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 #4: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 11:00:50 AM (PDT) on Tuesday, June 30, 2026.
The magnitude 1.0 event (a probable quarry explosion) occurred 45 km (28 miles) NE (52 degrees) of Holtville, CA.
The hypocentral depth is -0.20 km (-0.10 miles).
| Magnitude | 1.0 - local magnitude (Ml) |
| Time | Tuesday, June 30, 2026 at 11:00:50 AM (PDT) Tuesday, June 30, 2026 at 18:00:50 (UTC) |
| Distance from |
Holtville, CA - 45 km (28 miles) NE (52 degrees) Los Algodones, B.C., MX - 47 km (29 miles) NNW (328 degrees) Calipatria, CA - 48 km (30 miles) E (98 degrees) Brawley, CA - 50 km (31 miles) E (79 degrees) Yuma, AZ - 51 km (32 miles) NW (317 degrees) |
| Coordinates | 33 deg. 3.6 min. N (33.061N), 115 deg. 0.1 min. W (115.001W) |
| Depth | -0.20 km (-0.10 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=15, Nph=15, Dmin=10.1 km, Rmss=0.29 sec, Erho=0.65 km, Erzz=31.61 km, Gp=63 degrees |
| Event ID# | ci41284279 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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