2026-09-15 21:49:29 UPDATED: (M3.5) Rat Islands, Aleutian Islands, Alaska 51.5 179.0 (90be5)

M3.5 Earthquake - Rat Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	3.5
Date-Time	Universal Time (UTC): 15 Sep 2026 21:49:29 Time near the Epicenter (1): 15 Sep 2026 11:49:29 Time in your area (1): 15 Sep 2026 13:49:29
Location	51.485N 178.951E
Depth	57 km
Distances	308.4 km (191.2 mi) W of Adak, Alaska 1301.0 km (806.6 mi) ESE of Klyuchi, Russia 1393.5 km (864.0 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1408.8 km (873.5 mi) ESE of Vilyuchinsk, Russia 1409.8 km (874.1 mi) ESE of Yelizovo, Russia
Location Uncertainty	Horizontal: 10.0 km; Vertical 22.5 km
Parameters	Nph = 61; Dmin = 27.1 km; Rmss = 0.58 seconds; Gp = 213° Version =
Event ID	us 7000ths2 ***This event supersedes event AKa2026sijhmm.

(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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