Recent Earthquakes in California and Nevada


== PRELIMINARY EARTHQUAKE REPORT ==

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


Version #3: This report supersedes any earlier reports of this event. This event has been reviewed by a seismologist.

A micro earthquake occurred at 11:00:55 AM (PDT) on Friday, April 30, 2021.
The magnitude 1.5 event occurred 6 km (4 miles) N of Healdsburg, CA.
The hypocentral depth is 7 km ( 5 miles).


Magnitude 1.5 - duration magnitude (Md)
Time Friday, April 30, 2021 at 11:00:55 AM (PDT)
Friday, April 30, 2021 at 18:00:55 (UTC)
Distance from Healdsburg, CA - 6 km (4 miles) N (355 degrees)
Windsor, CA - 14 km (9 miles) NNW (339 degrees)
The Geysers, CA - 16 km (10 miles) SW (220 degrees)
Cloverdale, CA - 20 km (12 miles) SE (141 degrees)
Larkfield-Wikiup, CA - 20 km (13 miles) NNW (328 degrees)
Coordinates 38 deg. 40.1 min. N (38.668N), 122 deg. 52.5 min. W (122.876W)
Depth 7.42 km (4.6 miles)
Quality Good
Location Quality Parameters Nst=52, Nph=66, Dmin=5.7 km, Rmss=0.09 sec, Erho=0.19 km, Erzz=0.37 km, Gp=100 degrees
Event ID# nc73556560
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For more information, see https://earthquake.usgs.gov

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