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 8:55:44 PM (PDT) on Thursday, September 4, 2025.
The magnitude 0.9 event occurred 2 km (1 miles) N of Palomar Observatory, CA.
The hypocentral depth is 8 km ( 5 miles).


Magnitude 0.9 - local magnitude (Ml)
Time Thursday, September 4, 2025 at 8:55:44 PM (PDT)
Friday, September 5, 2025 at 3:55:44 (UTC)
Distance from Palomar Observatory, CA - 2 km (1 miles) N (352 degrees)
Aguanga, CA - 8 km (5 miles) S (181 degrees)
Lake Henshaw, CA - 17 km (11 miles) NW (326 degrees)
Pala, CA - 20 km (12 miles) E (88 degrees)
Valley Center, CA - 23 km (14 miles) NE (42 degrees)
Coordinates 33 deg. 22.3 min. N (33.372N), 116 deg. 52.0 min. W (116.867W)
Depth 8.40 km (5.20 miles)
Quality Good
Location Quality Parameters Nst=47, Nph=81, Dmin=2.1 km, Rmss=0.23 sec, Erho=0.2 km, Erzz=0.57 km, Gp=26 degrees
Event ID# ci41283608
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