Recent Earthquakes in California and Nevada
== PRELIMINARY EVENT REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #3: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.
A micro quarry occurred at 12:01:57 PM (PDT) on Thursday, July 31, 2025.
The magnitude 1.8 event (a probable quarry explosion) occurred 8 km (5 miles) NE (43 degrees) of Central Valley (historical), CA.
The hypocentral depth is -1 km (-0.40 miles).
| Magnitude | 1.8 - duration magnitude (Md) |
| Time | Thursday, July 31, 2025 at 12:01:57 PM (PDT) Thursday, July 31, 2025 at 19:01:57 (UTC) |
| Distance from |
Central Valley (historical), CA - 8 km (5 miles) NE (43 degrees) Shasta Lake, CA - 8 km (5 miles) NE (43 degrees) Bella Vista, CA - 12 km (7 miles) NNW (329 degrees) Redding, CA - 18 km (11 miles) NNE (17 degrees) Palo Cedro, CA - 20 km (12 miles) NNW (343 degrees) |
| Coordinates | 40 deg. 44.0 min. N (40.734N), 122 deg. 18.3 min. W (122.305W) |
| Depth | -0.63 km (-0.40 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=23, Nph=23, Dmin=14.3 km, Rmss=0.11 sec, Erho=0.25 km, Erzz=31.61 km, Gp=63 degrees |
| Event ID# | nc75217557 |
| 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)
