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 10:54:35 AM (PDT) on Monday, July 28, 2025.
The magnitude 1.4 event occurred 13 km (8 miles) SSW of Big Bear Lake, CA.
The hypocentral depth is 3 km ( 2 miles).


Magnitude 1.4 - local magnitude (Ml)
Time Monday, July 28, 2025 at 10:54:35 AM (PDT)
Monday, July 28, 2025 at 17:54:35 (UTC)
Distance from Big Bear Lake, CA - 13 km (8 miles) SSW (198 degrees)
Yucaipa, CA - 14 km (9 miles) NE (35 degrees)
Running Springs, CA - 16 km (10 miles) ESE (119 degrees)
Big Bear City, CA - 17 km (11 miles) SW (216 degrees)
Mentone, CA - 18 km (11 miles) ENE (66 degrees)
Coordinates 34 deg. 8.2 min. N (34.137N), 116 deg. 57.3 min. W (116.954W)
Depth 3.18 km (2.00 miles)
Quality Good
Location Quality Parameters Nst=62, Nph=107, Dmin=5.1 km, Rmss=0.17 sec, Erho=0.13 km, Erzz=0.34 km, Gp=22 degrees
Event ID# ci41034583
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