2026-08-31 21:46:03 (M4.4) South Sandwich Islands region -56.1 -28.1 (90be5)

M4.4 Earthquake - South Sandwich Islands region

Preliminary Report

Magnitude	4.4
Date-Time	Universal Time (UTC): 31 Aug 2026 21:46:03 Time near the Epicenter (1): 31 Aug 2026 19:46:03 Time in your area (1): 31 Aug 2026 13:46:03
Location	56.085S 28.077W
Depth	148 km
Distances	2421.9 km (1501.6 mi) SW of Edinburgh of the Seven Seas, Saint Helena 2514.0 km (1558.7 mi) ENE of Ushuaia, Argentina 2517.8 km (1561.0 mi) E of Río Grande, Argentina 2710.2 km (1680.3 mi) E of Río Gallegos, Argentina 2721.6 km (1687.4 mi) E of Puerto Deseado, Argentina
Location Uncertainty	Horizontal: 11.8 km; Vertical 9.4 km
Parameters	Nph = 19; Dmin = 572.2 km; Rmss = 0.65 seconds; Gp = 82° Version =
Event ID	us 7000td7p

(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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