2026-08-21 01:08:12 UPDATED: (M3.4) Andreanof Islands, Aleutian Islands, Alaska 51.3 -176.3 (90be5)

M3.4 Earthquake - Andreanof Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	3.4
Date-Time	Universal Time (UTC): 21 Aug 2026 01:08:12 Time near the Epicenter (1): 20 Aug 2026 15:08:12 Time in your area (1): 20 Aug 2026 17:08:12
Location	51.287N 176.254W
Depth	6 km
Distances	70.4 km (43.7 mi) SSE of Adak, Alaska 1540.6 km (955.2 mi) S of Anadyr, Russia 1600.3 km (992.2 mi) ESE of Klyuchi, Russia 1720.7 km (1066.8 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1736.3 km (1076.5 mi) ESE of Yelizovo, Russia
Location Uncertainty	Horizontal: 2.8 km; Vertical 8.4 km
Parameters	Nph = 39; Dmin = 64.9 km; Rmss = 0.81 seconds; Gp = 220° Version =
Event ID	us 6000tmdn ***This event supersedes event AKa2026qmpiyn.

(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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