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 #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 earthquake occurred at 8:26:46 PM (PDT) on Monday, April 5, 2021.
The magnitude 0.8 event occurred 4 km (3 miles) N (11 degrees) of Fontana, CA.
The hypocentral depth is 7 km ( 4 miles).


Magnitude 0.8 - local magnitude (Ml)
Time Monday, April 5, 2021 at 8:26:46 PM (PDT)
Tuesday, April 6, 2021 at 3:26:46 (UTC)
Distance from Fontana, CA - 4 km (3 miles) N (11 degrees)
Rialto, CA - 8 km (5 miles) WNW (294 degrees)
Bloomington, CA - 9 km (5 miles) NW (326 degrees)
Muscoy, CA - 10 km (6 miles) WSW (258 degrees)
Devore, CA - 11 km (7 miles) SSW (205 degrees)
Coordinates 34 deg. 8.1 min. N (34.135N), 117 deg. 27.0 min. W (117.449W)
Depth 7.1 km (4.4 miles)
Quality Fair
Location Quality Parameters Nst=15, Nph=18, Dmin=11.6 km, Rmss=0.25 sec, Erho=0.94 km, Erzz=1.9 km, Gp=144 degrees
Event ID# ci39840192
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