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 6:31:18 AM (PDT) on Monday, July 17, 2023.
The magnitude 1.5 event occurred 6 km (4 miles) ESE of Ridgemark, CA.
The hypocentral depth is 9 km ( 6 miles).


Magnitude 1.5 - duration magnitude (Md)
Time Monday, July 17, 2023 at 6:31:18 AM (PDT)
Monday, July 17, 2023 at 13:31:18 (UTC)
Distance from Ridgemark, CA - 6 km (4 miles) ESE (120 degrees)
Hollister, CA - 11 km (7 miles) SE (130 degrees)
San Juan Bautista, CA - 22 km (14 miles) ESE (108 degrees)
Chualar, CA - 30 km (19 miles) NE (38 degrees)
Prunedale, CA - 32 km (20 miles) E (88 degrees)
Coordinates 36 deg. 47.1 min. N (36.785N), 121 deg. 18.3 min. W (121.306W)
Depth 9.48 km (5.9 miles)
Quality Good
Location Quality Parameters Nst=30, Nph=37, Dmin=9.3 km, Rmss=0.1 sec, Erho=0.24 km, Erzz=0.36 km, Gp=97 degrees
Event ID# nc73913946
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For more information, see https://earthquake.usgs.gov

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