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

A micro earthquake occurred at 7:39:58 AM (PDT) on Tuesday, July 22, 2025.
The magnitude 1.0 event occurred 16 km (10 miles) WSW of Johannesburg, CA.
The hypocentral depth is 8 km ( 5 miles).


Magnitude 1.0 - local magnitude (Ml)
Time Tuesday, July 22, 2025 at 7:39:58 AM (PDT)
Tuesday, July 22, 2025 at 14:39:58 (UTC)
Distance from Johannesburg, CA - 16 km (10 miles) WSW (249 degrees)
California City, CA - 27 km (17 miles) NE (37 degrees)
Ridgecrest, CA - 35 km (22 miles) SSW (199 degrees)
Inyokern, CA - 36 km (23 miles) S (179 degrees)
Boron, CA - 38 km (24 miles) NNW (339 degrees)
Coordinates 35 deg. 19.2 min. N (35.319N), 117 deg. 48.2 min. W (117.804W)
Depth 7.56 km (4.70 miles)
Quality Good
Location Quality Parameters Nst=28, Nph=47, Dmin=6.9 km, Rmss=0.17 sec, Erho=0.21 km, Erzz=0.65 km, Gp=55 degrees
Event ID# ci41028575
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