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

A micro quarry occurred at 1:27:54 PM (PDT) on Thursday, April 29, 2021.
The magnitude 1.1 event (a probable quarry explosion) occurred 2 km (1 miles) E of Home Gardens, CA.
The hypocentral depth is -1 km (-0.3 miles).


Magnitude 1.1 - local magnitude (Ml)
Time Thursday, April 29, 2021 at 1:27:54 PM (PDT)
Thursday, April 29, 2021 at 20:27:54 (UTC)
Distance from Home Gardens, CA - 2 km (1 miles) E (100 degrees)
Corona, CA - 7 km (4 miles) E (86 degrees)
Norco, CA - 8 km (5 miles) SE (142 degrees)
Pedley, CA - 11 km (7 miles) S (189 degrees)
Riverside, CA - 12 km (8 miles) SW (228 degrees)
Coordinates 33 deg. 52.5 min. N (33.874N), 117 deg. 29.8 min. W (117.496W)
Depth -0.54 km (-0.3 miles)
Quality Fair
Location Quality Parameters Nst=18, Nph=18, Dmin=7.9 km, Rmss=0.23 sec, Erho=0.66 km, Erzz=31.61 km, Gp=86 degrees
Event ID# ci39635327
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