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

A micro earthquake occurred at 5:02:51 AM (PST) on Thursday, December 4, 2025.
The magnitude 0.6 event occurred 5 km (3 miles) S of Mentone, CA.
The hypocentral depth is 5 km ( 3 miles).


Magnitude 0.6 - local magnitude (Ml)
Time Thursday, December 4, 2025 at 5:02:51 AM (PST)
Thursday, December 4, 2025 at 13:02:51 (UTC)
Distance from Mentone, CA - 5 km (3 miles) S (169 degrees)
Redlands, CA - 6 km (4 miles) ESE (118 degrees)
Calimesa, CA - 8 km (5 miles) NW (305 degrees)
Yucaipa, CA - 8 km (5 miles) W (267 degrees)
Loma Linda, CA - 13 km (8 miles) E (99 degrees)
Coordinates 34 deg. 1.8 min. N (34.030N), 117 deg. 7.5 min. W (117.125W)
Depth 4.71 km (2.90 miles)
Quality Good
Location Quality Parameters Nst=20, Nph=29, Dmin=1.3 km, Rmss=0.14 sec, Erho=0.23 km, Erzz=0.38 km, Gp=105 degrees
Event ID# ci41132367
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