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== PRELIMINARY EARTHQUAKE REPORT ==

Southern California Seismic Network: a cooperative project of
U.S. Geological Survey, Pasadena California
Caltech Seismological Laboratory, Pasadena, California



Version #4: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 4:50:41 PM (PST) on Tuesday, December 4, 2018.
The magnitude 0.7 event occurred 9 km (5 miles) ENE (72 degrees) of Palomar Observatory, CA.
The hypocentral depth is 13 km ( 8 miles).



Magnitude 0.7 - local magnitude (Ml)
Time Tuesday, December 4, 2018 at 4:50:41 PM (PST)
Wednesday, December 5, 2018 at 0:50:41 (UTC)
Distance from Palomar Observatory, CA - 9 km (5 miles) ENE (72 degrees)
Aguanga, CA - 11 km (7 miles) SE (131 degrees)
Lake Henshaw, CA - 15 km (10 miles) N (355 degrees)
Warner Springs, CA - 17 km (11 miles) NW (309 degrees)
Anza, CA - 22 km (14 miles) SSW (206 degrees)
Coordinates 33 deg. 22.7 min. N (33.379N), 116 deg. 46.6 min. W (116.776W)
Depth 13.3 km (8.3 miles)
Quality Good
Location Quality Parameters Nst=23, Nph=34, Dmin=8.5 km, Rmss=0.21 sec, Erho=0.34 km, Erzz=0.93 km, Gp=62 degrees
Event ID# ci38385960
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