2025-10-28 12:17:42 (M4.1) Antofagasta, Chile -23.1 -68.4 (90be5)

M4.1 Earthquake - Antofagasta, Chile

Preliminary Report

Magnitude	4.1
Date-Time	Universal Time (UTC): 28 Oct 2025 12:17:42 Time near the Epicenter (1): 28 Oct 2025 08:17:42 Time in your area (1): 28 Oct 2025 04:17:42
Location	23.066S 68.431W
Depth	105 km
Distances	29.1 km (18.1 mi) SW of San Pedro de Atacama, Chile 84.4 km (52.3 mi) SE of Calama, Chile 206.6 km (128.1 mi) E of Mejillones, Chile 211.1 km (130.9 mi) ENE of Antofagasta, Chile 211.3 km (131.0 mi) ESE of Tocopilla, Chile
Location Uncertainty	Horizontal: 6.3 km; Vertical 9.2 km
Parameters	Nph = 18; Dmin = 28.8 km; Rmss = 0.51 seconds; Gp = 77° Version =
Event ID	us 6000rjwn

(1) Nominal Standard Time; local and daylight savings time zone may differ.
For updates, maps, and technical information
see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey


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