Recent Earthquakes in California and Nevada


== PRELIMINARY EVENT 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 quarry occurred at 1:50:44 PM (PDT) on Wednesday, April 7, 2021.
The magnitude 1.0 event (a probable quarry explosion) occurred 1 km (1 miles) ESE of Home Gardens, CA.
The hypocentral depth is 2 km ( 1 mile).


Magnitude 1.0 - local magnitude (Ml)
Time Wednesday, April 7, 2021 at 1:50:44 PM (PDT)
Wednesday, April 7, 2021 at 20:50:44 (UTC)
Distance from Home Gardens, CA - 1 km (1 miles) ESE (119 degrees)
Corona, CA - 5 km (3 miles) E (87 degrees)
Norco, CA - 7 km (5 miles) SSE (151 degrees)
Pedley, CA - 12 km (7 miles) SSW (195 degrees)
Mira Loma, CA - 13 km (8 miles) S (177 degrees)
Coordinates 33 deg. 52.4 min. N (33.873N), 117 deg. 30.6 min. W (117.509W)
Depth 1.54 km (1.0 miles)
Quality Good
Location Quality Parameters Nst=32, Nph=34, Dmin=8.6 km, Rmss=0.27 sec, Erho=0.45 km, Erzz=0.73 km, Gp=43 degrees
Event ID# ci39842528
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