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 #6: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 4:51:49 PM (PDT) on Wednesday, July 30, 2025.
The magnitude 1.0 event occurred 4 km (2 miles) SE of Loma Linda, CA.
The hypocentral depth is 17 km (11 miles).


Magnitude 1.0 - local magnitude (Ml)
Time Wednesday, July 30, 2025 at 4:51:49 PM (PDT)
Wednesday, July 30, 2025 at 23:51:49 (UTC)
Distance from Loma Linda, CA - 4 km (2 miles) SE (132 degrees)
Redlands, CA - 6 km (3 miles) SW (231 degrees)
Grand Terrace, CA - 8 km (5 miles) E (98 degrees)
Colton, CA - 10 km (6 miles) SE (125 degrees)
Mentone, CA - 10 km (6 miles) WSW (240 degrees)
Coordinates 34 deg. 1.5 min. N (34.024N), 117 deg. 13.8 min. W (117.230W)
Depth 17.32 km (10.80 miles)
Quality Good
Location Quality Parameters Nst=31, Nph=50, Dmin=10.0 km, Rmss=0.16 sec, Erho=0.23 km, Erzz=0.47 km, Gp=87 degrees
Event ID# ci41248992
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