2025-10-08 03:50:46 (M5.4) South Sandwich Islands region -57.8 -24.2 (70fa9)

M5.4 Earthquake - South Sandwich Islands region

Preliminary Report

Magnitude	5.4
Date-Time	Universal Time (UTC): 8 Oct 2025 03:50:46 Time near the Epicenter (1): 8 Oct 2025 01:50:46 Time in your area (1): 8 Oct 2025 09:20:46
Location	57.825S 24.158W
Depth	10 km
Distances	2466.2 km (1529.0 mi) SSW of Edinburgh of the Seven Seas, Saint Helena 2703.5 km (1676.2 mi) ENE of Ushuaia, Argentina 2718.5 km (1685.5 mi) E of Río Grande, Argentina 2925.5 km (1813.8 mi) E of Río Gallegos, Argentina 2939.2 km (1822.3 mi) E of Punta Arenas, Chile
Location Uncertainty	Horizontal: 7.8 km; Vertical 1.9 km
Parameters	Nph = 92; Dmin = 862.8 km; Rmss = 1.11 seconds; Gp = 87° Version =
Event ID	us 6000rfjc

(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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