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 5:13:35 AM (PDT) on Wednesday, September 17, 2025.
The magnitude 1.9 event occurred 8 km (5 miles) ENE (59 degrees) of North Tustin, CA.
The hypocentral depth is 9 km ( 6 miles).


Magnitude 1.9 - local magnitude (Ml)
Time Wednesday, September 17, 2025 at 5:13:35 AM (PDT)
Wednesday, September 17, 2025 at 12:13:35 (UTC)
Distance from North Tustin, CA - 8 km (5 miles) ENE (59 degrees)
Villa Park, CA - 9 km (5 miles) E (100 degrees)
Orange, CA - 10 km (6 miles) E (92 degrees)
Tustin, CA - 11 km (7 miles) ENE (58 degrees)
Yorba Linda, CA - 13 km (8 miles) SE (139 degrees)
Coordinates 33 deg. 48.0 min. N (33.800N), 117 deg. 43.3 min. W (117.721W)
Depth 9.35 km (5.80 miles)
Quality Good
Location Quality Parameters Nst=78, Nph=130, Dmin=7.1 km, Rmss=0.19 sec, Erho=0.18 km, Erzz=0.36 km, Gp=53 degrees
Event ID# ci41292944
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