2026-04-03 09:21:23 (M4.1) Rat Islands, Aleutian Islands, Alaska 50.7 175.9 (90be5)

M4.1 Earthquake - Rat Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	4.1
Date-Time	Universal Time (UTC): 3 Apr 2026 09:21:24 Time near the Epicenter (1): 2 Apr 2026 23:21:24 Time in your area (1): 3 Apr 2026 01:21:24
Location	50.718N 175.870E
Depth	20 km
Distances	300.6 km (186.4 mi) SE of Attu Station, Alaska 1171.8 km (726.5 mi) SE of Klyuchi, Russia 1212.2 km (751.6 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1225.8 km (760.0 mi) ESE of Vilyuchinsk, Russia 1230.0 km (762.6 mi) ESE of Yelizovo, Russia
Location Uncertainty	Horizontal: 18.8 km; Vertical 0.0 km
Parameters	Nph = 25; Dmin = 233.5 km; Rmss = 0.40 seconds; Gp = 338° Version =
Event ID	ak a2026gnplmx

(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
Alaska Earthquake Center
Geophysical Institute, University of Alaska Fairbanks

https://earthquake.alaska.edu

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