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 event has been reviewed by a seismologist.

A micro earthquake occurred at 11:20:28 PM (PDT) on Sunday, October 4, 2026.
The magnitude 1.0 event occurred 5 km (3 miles) SE of Loma Linda, CA.
The hypocentral depth is 17 km (10 miles).


Magnitude 1.0 - local magnitude (Ml)
Time Sunday, October 4, 2026 at 11:20:28 PM (PDT)
Monday, October 5, 2026 at 6:20:28 (UTC)
Distance from Loma Linda, CA - 5 km (3 miles) SE (136 degrees)
Redlands, CA - 6 km (4 miles) SW (224 degrees)
Grand Terrace, CA - 8 km (5 miles) ESE (102 degrees)
Moreno Valley, CA - 10 km (6 miles) N (1 degrees)
Colton, CA - 10 km (6 miles) SE (127 degrees)
Coordinates 34 deg. 1.1 min. N (34.019N), 117 deg. 13.6 min. W (117.226W)
Depth 16.76 km (10.40 miles)
Quality Excellent
Location Quality Parameters Nst=59, Nph=105, Dmin=9.3 km, Rmss=0.13 sec, Erho=0.11 km, Erzz=0.29 km, Gp=26 degrees
Event ID# ci41343359
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