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== PRELIMINARY EVENT REPORT ==

U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, 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 11:08:46 AM (PDT) on Monday, July 9, 2018.
The magnitude 1.3 event (a probable quarry explosion) occurred 2 km (1 miles) ENE (67 degrees) of Aromas, CA.
The hypocentral depth is -0.14 km (-0.1 miles).



Magnitude 1.3 - duration magnitude (Md)
Time Monday, July 9, 2018 at 11:08:46 AM (PDT)
Monday, July 9, 2018 at 18:08:46 (UTC)
Distance from Aromas, CA - 2 km (1 miles) ENE (67 degrees)
Las Lomas, CA - 10 km (6 miles) ENE (72 degrees)
San Juan Bautista, CA - 10 km (6 miles) NW (305 degrees)
Pajaro, CA - 11 km (7 miles) E (96 degrees)
Interlaken, CA - 11 km (7 miles) SE (124 degrees)
Coordinates 36 deg. 53.7 min. N (36.894N), 121 deg. 37.6 min. W (121.626W)
Depth -0.14 km (-0.1 miles)
Quality Good
Location Quality Parameters Nst=13, Nph=13, Dmin=3.2 km, Rmss=0.1 sec, Erho=0.26 km, Erzz=31.61 km, Gp=66 degrees
Event ID# nc73042286
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