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 5:05:30 PM (PST) on Monday, December 1, 2025.
The magnitude 1.2 event occurred 10 km (6 miles) SSW of Big Bear Lake, CA.
The hypocentral depth is 7 km ( 4 miles).


Magnitude 1.2 - local magnitude (Ml)
Time Monday, December 1, 2025 at 5:05:30 PM (PST)
Tuesday, December 2, 2025 at 1:05:30 (UTC)
Distance from Big Bear Lake, CA - 10 km (6 miles) SSW (209 degrees)
Running Springs, CA - 14 km (9 miles) ESE (111 degrees)
Yucaipa, CA - 16 km (10 miles) NNE (26 degrees)
Big Bear City, CA - 16 km (10 miles) SW (226 degrees)
Mentone, CA - 19 km (12 miles) NE (56 degrees)
Coordinates 34 deg. 9.8 min. N (34.163N), 116 deg. 58.0 min. W (116.966W)
Depth 7.09 km (4.40 miles)
Quality Good
Location Quality Parameters Nst=56, Nph=98, Dmin=8.1 km, Rmss=0.14 sec, Erho=0.12 km, Erzz=0.34 km, Gp=26 degrees
Event ID# ci41130647
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