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 7:43:54 PM (PDT) on Monday, August 25, 2025.
The magnitude 0.7 event occurred 2 km (1 miles) E (91 degrees) of Colton, CA.
The hypocentral depth is 15 km ( 9 miles).


Magnitude 0.7 - local magnitude (Ml)
Time Monday, August 25, 2025 at 7:43:54 PM (PDT)
Tuesday, August 26, 2025 at 2:43:54 (UTC)
Distance from Colton, CA - 2 km (1 miles) E (91 degrees)
Loma Linda, CA - 4 km (2 miles) NW (315 degrees)
Grand Terrace, CA - 5 km (3 miles) NNE (24 degrees)
San Bernardino, CA - 6 km (4 miles) S (179 degrees)
Rialto, CA - 8 km (5 miles) ESE (117 degrees)
Coordinates 34 deg. 4.4 min. N (34.074N), 117 deg. 17.5 min. W (117.292W)
Depth 15.01 km (9.30 miles)
Quality Excellent
Location Quality Parameters Nst=26, Nph=42, Dmin=6.2 km, Rmss=0.13 sec, Erho=0.2 km, Erzz=0.39 km, Gp=68 degrees
Event ID# ci41275024
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