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

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Version #7: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 8:16:38 AM (PST) on Sunday, February 16, 2025.
The magnitude 0.6 event occurred 4 km (3 miles) SE of Ontario, CA.
The hypocentral depth is 3 km ( 2 miles).

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Magnitude	0.6 - local magnitude (Ml)
Time	Sunday, February 16, 2025 at 8:16:38 AM (PST) Sunday, February 16, 2025 at 16:16:38 (UTC)
Distance from	Ontario, CA - 4 km (3 miles) SE (139 degrees) Mira Loma, CA - 8 km (5 miles) WNW (295 degrees) Chino, CA - 9 km (5 miles) E (81 degrees) Upland, CA - 9 km (6 miles) SSE (150 degrees) Montclair, CA - 10 km (6 miles) SE (125 degrees)
Coordinates	34 deg. 1.4 min. N (34.024N), 117 deg. 35.8 min. W (117.597W)
Depth	3.18 km (2.00 miles)
Quality	Excellent
Location Quality Parameters	Nst=14, Nph=20, Dmin=1.4 km, Rmss=0.11 sec, Erho=0.2 km, Erzz=0.25 km, Gp=62 degrees
Event ID#	ci40187010
Additional Information	Map

For more information, see https://earthquake.usgs.gov

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