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 1:31:02 PM (PDT) on Wednesday, August 27, 2025.
The magnitude 1.0 event occurred 9 km (5 miles) ENE (58 degrees) of Running Springs, CA.
The hypocentral depth is 1 km ( 1 mile).


Magnitude 1.0 - local magnitude (Ml)
Time Wednesday, August 27, 2025 at 1:31:02 PM (PDT)
Wednesday, August 27, 2025 at 20:31:02 (UTC)
Distance from Running Springs, CA - 9 km (5 miles) ENE (58 degrees)
Big Bear Lake, CA - 11 km (7 miles) W (273 degrees)
Lake Arrowhead, CA - 15 km (9 miles) E (89 degrees)
Big Bear City, CA - 17 km (11 miles) W (266 degrees)
Highland, CA - 21 km (13 miles) NE (51 degrees)
Coordinates 34 deg. 15.0 min. N (34.250N), 117 deg. 1.8 min. W (117.029W)
Depth 0.93 km (0.60 miles)
Quality Good
Location Quality Parameters Nst=30, Nph=45, Dmin=2.4 km, Rmss=0.18 sec, Erho=0.2 km, Erzz=0.25 km, Gp=49 degrees
Event ID# ci41276864
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