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

A micro earthquake occurred at 11:42:15 PM (PDT) on Thursday, August 28, 2025.
The magnitude 1.9 event occurred 17 km (11 miles) WSW of Johannesburg, CA.
The hypocentral depth is 7 km ( 5 miles).


Magnitude 1.9 - local magnitude (Ml)
Time Thursday, August 28, 2025 at 11:42:15 PM (PDT)
Friday, August 29, 2025 at 6:42:15 (UTC)
Distance from Johannesburg, CA - 17 km (11 miles) WSW (250 degrees)
California City, CA - 27 km (17 miles) NE (36 degrees)
Ridgecrest, CA - 36 km (22 miles) SSW (201 degrees)
Inyokern, CA - 36 km (23 miles) S (180 degrees)
Boron, CA - 39 km (24 miles) NNW (337 degrees)
Coordinates 35 deg. 19.2 min. N (35.321N), 117 deg. 48.8 min. W (117.814W)
Depth 7.48 km (4.60 miles)
Quality Good
Location Quality Parameters Nst=58, Nph=105, Dmin=6.6 km, Rmss=0.17 sec, Erho=0.17 km, Erzz=0.48 km, Gp=35 degrees
Event ID# ci41277960
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