Recent Earthquakes in California and Nevada


== PRELIMINARY EVENT REPORT ==

Southern California Seismic Network: a cooperative project of
U.S. Geological Survey, Pasadena California
Caltech Seismological Laboratory, Pasadena, 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 12:31:34 PM (PDT) on Friday, July 14, 2023.
The magnitude 1.3 event (a probable quarry explosion) occurred 5 km (3 miles) NE (45 degrees) of San Ysidro, CA.
The hypocentral depth is 3 km ( 2 miles).


Magnitude 1.3 - local magnitude (Ml)
Time Friday, July 14, 2023 at 12:31:34 PM (PDT)
Friday, July 14, 2023 at 19:31:34 (UTC)
Distance from San Ysidro, CA - 5 km (3 miles) NE (45 degrees)
Tijuana, B.C., MX - 6 km (4 miles) NNE (14 degrees)
Chula Vista, CA - 6 km (4 miles) SE (138 degrees)
Bonita, CA - 8 km (5 miles) SSE (162 degrees)
Imperial Beach, CA - 10 km (6 miles) E (89 degrees)
Coordinates 32 deg. 35.2 min. N (32.586N), 117 deg. 0.2 min. W (117.003W)
Depth 3.33 km (2.1 miles)
Quality Fair
Location Quality Parameters Nst=23, Nph=23, Dmin=7.2 km, Rmss=0.16 sec, Erho=0.57 km, Erzz=0.52 km, Gp=146 degrees
Event ID# ci39613130
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