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 #6: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 5:24:55 AM (PDT) on Thursday, October 8, 2026.
The magnitude 0.6 event occurred 7 km (4 miles) N of Rancho Cucamonga, CA.
The hypocentral depth is 7 km ( 4 miles).


Magnitude 0.6 - local magnitude (Ml)
Time Thursday, October 8, 2026 at 5:24:55 AM (PDT)
Thursday, October 8, 2026 at 12:24:55 (UTC)
Distance from Rancho Cucamonga, CA - 7 km (4 miles) N (355 degrees)
Lytle Creek, CA - 11 km (7 miles) SW (225 degrees)
Upland, CA - 12 km (7 miles) NNE (30 degrees)
Ontario, CA - 15 km (10 miles) NNE (14 degrees)
Fontana, CA - 15 km (10 miles) NW (310 degrees)
Coordinates 34 deg. 11.2 min. N (34.188N), 117 deg. 35.2 min. W (117.586W)
Depth 6.55 km (4.10 miles)
Quality Good
Location Quality Parameters Nst=14, Nph=24, Dmin=8.3 km, Rmss=0.15 sec, Erho=0.32 km, Erzz=0.55 km, Gp=79 degrees
Event ID# ci41345007
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