Recent Earthquakes in California and Nevada


== PRELIMINARY EARTHQUAKE 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 earthquake occurred at 10:45:51 PM (PDT) on Friday, August 15, 2025.
The magnitude 1.1 event occurred 16 km (10 miles) W of Johannesburg, CA.
The hypocentral depth is 8 km ( 5 miles).


Magnitude 1.1 - local magnitude (Ml)
Time Friday, August 15, 2025 at 10:45:51 PM (PDT)
Saturday, August 16, 2025 at 5:45:51 (UTC)
Distance from Johannesburg, CA - 16 km (10 miles) W (261 degrees)
California City, CA - 30 km (18 miles) NNE (33 degrees)
Ridgecrest, CA - 32 km (20 miles) SSW (202 degrees)
Inyokern, CA - 33 km (21 miles) S (179 degrees)
Boron, CA - 41 km (26 miles) NNW (340 degrees)
Coordinates 35 deg. 21.0 min. N (35.349N), 117 deg. 48.5 min. W (117.808W)
Depth 8.37 km (5.20 miles)
Quality Good
Location Quality Parameters Nst=33, Nph=60, Dmin=9.7 km, Rmss=0.15 sec, Erho=0.17 km, Erzz=0.54 km, Gp=64 degrees
Event ID# ci40400050
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