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 10:47:15 AM (PDT) on Monday, September 29, 2025.
The magnitude 1.1 event occurred 30 km (18 miles) S of Trona, CA.
The hypocentral depth is 8 km ( 5 miles).


Magnitude 1.1 - local magnitude (Ml)
Time Monday, September 29, 2025 at 10:47:15 AM (PDT)
Monday, September 29, 2025 at 17:47:15 (UTC)
Distance from Trona, CA - 30 km (18 miles) S (172 degrees)
Searles Valley, CA - 30 km (19 miles) SSE (168 degrees)
Johannesburg, CA - 31 km (19 miles) ENE (63 degrees)
Ridgecrest, CA - 34 km (21 miles) ESE (113 degrees)
Inyokern, CA - 46 km (29 miles) ESE (110 degrees)
Coordinates 35 deg. 30.0 min. N (35.500N), 117 deg. 19.9 min. W (117.332W)
Depth 8.34 km (5.20 miles)
Quality Good
Location Quality Parameters Nst=29, Nph=47, Dmin=4.0 km, Rmss=0.15 sec, Erho=0.23 km, Erzz=0.35 km, Gp=82 degrees
Event ID# ci41100655
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