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 4:50:18 PM (PDT) on Sunday, August 3, 2025.
The magnitude 1.0 event occurred 11 km (7 miles) NE (47 degrees) of Running Springs, CA.
The hypocentral depth is 6 km ( 4 miles).


Magnitude 1.0 - local magnitude (Ml)
Time Sunday, August 3, 2025 at 4:50:18 PM (PDT)
Sunday, August 3, 2025 at 23:50:18 (UTC)
Distance from Running Springs, CA - 11 km (7 miles) NE (47 degrees)
Big Bear Lake, CA - 11 km (7 miles) WNW (289 degrees)
Lake Arrowhead, CA - 16 km (10 miles) E (79 degrees)
Big Bear City, CA - 16 km (10 miles) W (276 degrees)
Lucerne Valley, CA - 19 km (12 miles) SSW (195 degrees)
Coordinates 34 deg. 16.5 min. N (34.276N), 117 deg. 1.3 min. W (117.021W)
Depth 6.35 km (3.90 miles)
Quality Good
Location Quality Parameters Nst=27, Nph=42, Dmin=2.6 km, Rmss=0.15 sec, Erho=0.23 km, Erzz=0.43 km, Gp=59 degrees
Event ID# ci41252320
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