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 #3: 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 3:04:13 PM (PST) on Tuesday, December 30, 2025.
The magnitude 1.2 event occurred 7 km (5 miles) SW of Lytle Creek, CA.
The hypocentral depth is 9 km ( 5 miles).


Magnitude 1.2 - local magnitude (Ml)
Time Tuesday, December 30, 2025 at 3:04:13 PM (PST)
Tuesday, December 30, 2025 at 23:04:13 (UTC)
Distance from Lytle Creek, CA - 7 km (5 miles) SW (215 degrees)
Rancho Cucamonga, CA - 10 km (6 miles) NNE (19 degrees)
Devore, CA - 13 km (8 miles) W (262 degrees)
Fontana, CA - 14 km (9 miles) NW (326 degrees)
Upland, CA - 15 km (9 miles) NE (38 degrees)
Coordinates 34 deg. 12.3 min. N (34.205N), 117 deg. 32.7 min. W (117.546W)
Depth 8.69 km (5.40 miles)
Quality Good
Location Quality Parameters Nst=17, Nph=18, Dmin=4.3 km, Rmss=0.11 sec, Erho=0.73 km, Erzz=0.83 km, Gp=158 degrees
Event ID# ci41149743
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