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 11:24:00 AM (PDT) on Wednesday, July 8, 2026.
The magnitude 1.0 event (a probable quarry explosion) occurred 3 km (2 miles) NE (51 degrees) of Bradbury, CA.
The hypocentral depth is -1 km (-1 miles).
| Magnitude | 1.0 - local magnitude (Ml) |
| Time | Wednesday, July 8, 2026 at 11:24:00 AM (PDT) Wednesday, July 8, 2026 at 18:24:00 (UTC) |
| Distance from |
Bradbury, CA - 3 km (2 miles) NE (51 degrees) Duarte, CA - 4 km (3 miles) NE (47 degrees) Azusa, CA - 5 km (3 miles) NW (320 degrees) Monrovia, CA - 6 km (4 miles) ENE (68 degrees) Irwindale, CA - 7 km (4 miles) N (355 degrees) |
| Coordinates | 34 deg. 10.0 min. N (34.167N), 117 deg. 56.5 min. W (117.942W) |
| Depth | -0.89 km (-0.60 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=20, Nph=20, Dmin=4.8 km, Rmss=0.29 sec, Erho=0.63 km, Erzz=31.61 km, Gp=56 degrees |
| Event ID# | ci41289359 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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