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== PRELIMINARY EARTHQUAKE REPORT ==

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



Version #2: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 12:09:17 PM (PDT) on Wednesday, May 20, 2020.
The magnitude 0.4 event occurred 4 km (3 miles) WNW of Mammoth Lakes, CA.
The hypocentral depth is -0.38 km (-0.2 miles).



Magnitude 0.4 - duration magnitude (Md)
Time Wednesday, May 20, 2020 at 12:09:17 PM (PDT)
Wednesday, May 20, 2020 at 19:09:17 (UTC)
Distance from Mammoth Lakes, CA - 4 km (3 miles) WNW (292 degrees)
Yosemite Valley, CA - 50 km (31 miles) E (101 degrees)
West Bishop, CA - 60 km (37 miles) WNW (303 degrees)
Dixon Lane-Meadow Creek, CA - 61 km (38 miles) WNW (299 degrees)
Bishop, CA - 64 km (40 miles) WNW (300 degrees)
Coordinates 37 deg. 39.1 min. N (37.652N), 119 deg. 1.6 min. W (119.026W)
Depth -0.38 km (-0.2 miles)
Quality Excellent
Location Quality Parameters Nst=9, Nph=12, Dmin=1.0 km, Rmss=0.03 sec, Erho=0.23 km, Erzz=0.36 km, Gp=77 degrees
Event ID# nc73391566
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