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 3:57:35 PM (PDT) on Thursday, June 18, 2026.
The magnitude 0.7 event occurred 8 km (5 miles) N of Rancho Cucamonga, CA.
The hypocentral depth is 6 km ( 4 miles).


Magnitude 0.7 - local magnitude (Ml)
Time Thursday, June 18, 2026 at 3:57:35 PM (PDT)
Thursday, June 18, 2026 at 22:57:35 (UTC)
Distance from Rancho Cucamonga, CA - 8 km (5 miles) N (360 degrees)
Lytle Creek, CA - 11 km (7 miles) SW (225 degrees)
Upland, CA - 12 km (8 miles) NNE (31 degrees)
Fontana, CA - 15 km (10 miles) NW (313 degrees)
Montclair, CA - 16 km (10 miles) NE (38 degrees)
Coordinates 34 deg. 11.5 min. N (34.192N), 117 deg. 34.8 min. W (117.580W)
Depth 5.80 km (3.60 miles)
Quality Good
Location Quality Parameters Nst=16, Nph=26, Dmin=7.6 km, Rmss=0.19 sec, Erho=0.47 km, Erzz=0.77 km, Gp=99 degrees
Event ID# ci41490344
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