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== PRELIMINARY EARTHQUAKE REPORT ==

U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California



Version #643784: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 9:30:02 PM (PDT) on Monday, July 9, 2018.
The magnitude 2.9 event occurred 30 km (19 miles) SW of Portola, CA.
The hypocentral depth is 6 km ( 4 miles).



Magnitude 2.9 - local magnitude (Ml)
Time Monday, July 9, 2018 at 9:30:02 PM (PDT)
Tuesday, July 10, 2018 at 4:30:02 (UTC)
Distance from Portola, CA - 30 km (19 miles) SW (214 degrees)
East Quincy, CA - 43 km (27 miles) SSE (153 degrees)
Quincy, CA - 46 km (28 miles) SSE (148 degrees)
Nevada City, CA - 47 km (29 miles) NE (39 degrees)
Truckee, CA - 51 km (31 miles) NW (305 degrees)
Coordinates 39 deg. 35.2 min. N (39.587N), 120 deg. 40.1 min. W (120.668W)
Depth 6.46 km (4.0 miles)
Quality Good
Location Quality Parameters Nst=28, Nph=41, Dmin=20.0 km, Rmss=0.12 sec, Erho=0.24 km, Erzz=1.29 km, Gp=61.35 degrees
Event ID# nc73042541
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