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 11:45:36 AM (PDT) on Monday, August 3, 2026.
The magnitude 1.2 event (a probable quarry explosion) occurred 5 km (3 miles) NE (44 degrees) of Bradbury, CA.
The hypocentral depth is -1 km (-0.50 miles).
| Magnitude | 1.2 - local magnitude (Ml) |
| Time | Monday, August 3, 2026 at 11:45:36 AM (PDT) Monday, August 3, 2026 at 18:45:36 (UTC) |
| Distance from |
Bradbury, CA - 5 km (3 miles) NE (44 degrees) Azusa, CA - 6 km (3 miles) NNW (334 degrees) Duarte, CA - 6 km (4 miles) NE (42 degrees) Monrovia, CA - 7 km (4 miles) ENE (60 degrees) Irwindale, CA - 8 km (5 miles) N (1 degrees) |
| Coordinates | 34 deg. 10.7 min. N (34.179N), 117 deg. 56.1 min. W (117.934W) |
| Depth | -0.88 km (-0.50 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=17, Nph=17, Dmin=5.6 km, Rmss=0.26 sec, Erho=0.63 km, Erzz=31.61 km, Gp=75 degrees |
| Event ID# | ci40665722 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
[
Index map ||
Big earthquake list ||
All earthquake list ||
Glossary of terms ||
Top page
]
[
Did you feel it? ||
ShakeMaps
|| Relative2Me
]
[ Data Sources ]
Special maps
Long Valley || Los Angeles || San Francisco
Data Sources
US and World - USGS/NEIC = National Earthquake Information Center
Northern California - UCB = University of California, Berkeley
Southern California - Caltech = California Institute of Technology
Nevada - UNR = University of Nevada, Reno
Offshore = West Coast & Alaska Tsunami Warning Center
...all members of the Advanced National Seismic System (ANSS)
