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 #7: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 4:21:00 PM (PDT) on Monday, July 21, 2025.
The magnitude 1.7 event (a probable quarry explosion) occurred 6 km (3 miles) NW of Boron, CA.
The hypocentral depth is -1 km (-0.50 miles).
| Magnitude | 1.7 - local magnitude (Ml) |
| Time | Monday, July 21, 2025 at 4:21:00 PM (PDT) Monday, July 21, 2025 at 23:21:00 (UTC) |
| Distance from |
Boron, CA - 6 km (3 miles) NW (315 degrees) Edwards Air Force Base, CA - 26 km (16 miles) NE (56 degrees) California City, CA - 28 km (18 miles) ESE (111 degrees) Johannesburg, CA - 38 km (24 miles) S (188 degrees) Mojave, CA - 44 km (27 miles) E (92 degrees) |
| Coordinates | 35 deg. 2.1 min. N (35.035N), 117 deg. 41.6 min. W (117.693W) |
| Depth | -0.82 km (-0.50 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=28, Nph=28, Dmin=11.1 km, Rmss=0.13 sec, Erho=0.4 km, Erzz=31.61 km, Gp=82 degrees |
| Event ID# | ci41028119 |
| 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)
