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 #6: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 3:31:31 PM (PDT) on Monday, March 16, 2026.
The magnitude 1.1 event (a probable quarry explosion) occurred 4 km (2 miles) NE (50 degrees) of Bradbury, CA.
The hypocentral depth is -1 km (-0.40 miles).
| Magnitude | 1.1 - local magnitude (Ml) |
| Time | Monday, March 16, 2026 at 3:31:31 PM (PDT) Monday, March 16, 2026 at 22:31:31 (UTC) |
| Distance from |
Bradbury, CA - 4 km (2 miles) NE (50 degrees) Duarte, CA - 5 km (3 miles) NE (47 degrees) Azusa, CA - 5 km (3 miles) NW (321 degrees) Monrovia, CA - 6 km (4 miles) ENE (68 degrees) Irwindale, CA - 7 km (4 miles) N (356 degrees) |
| Coordinates | 34 deg. 10.1 min. N (34.168N), 117 deg. 56.4 min. W (117.941W) |
| Depth | -0.63 km (-0.40 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=19, Nph=19, Dmin=4.8 km, Rmss=0.2 sec, Erho=0.47 km, Erzz=31.61 km, Gp=114 degrees |
| Event ID# | ci41205615 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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