Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE 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 is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro earthquake occurred at 3:48:40 PM (PDT) on Thursday, July 31, 2025.
The magnitude 1.4 event occurred 5 km (3 miles) N (3 degrees) of Fontana, CA.
The hypocentral depth is 8 km ( 5 miles).
| Magnitude | 1.4 - local magnitude (Ml) |
| Time | Thursday, July 31, 2025 at 3:48:40 PM (PDT) Thursday, July 31, 2025 at 22:48:40 (UTC) |
| Distance from |
Fontana, CA - 5 km (3 miles) N (3 degrees) Rialto, CA - 9 km (5 miles) WNW (295 degrees) Bloomington, CA - 9 km (6 miles) NW (325 degrees) Devore, CA - 10 km (6 miles) SSW (209 degrees) Muscoy, CA - 10 km (6 miles) W (261 degrees) |
| Coordinates | 34 deg. 8.4 min. N (34.140N), 117 deg. 27.3 min. W (117.456W) |
| Depth | 8.18 km (5.10 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=71, Nph=123, Dmin=4.7 km, Rmss=0.22 sec, Erho=0.17 km, Erzz=0.37 km, Gp=25 degrees |
| Event ID# | ci41250024 |
| 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)
