2026-04-17 21:12:55 (M4.0) Rat Islands, Aleutian Islands, Alaska 51.9 176.3 (90be5)

M4.0 Earthquake - Rat Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	4.0
Date-Time	Universal Time (UTC): 17 Apr 2026 21:12:56 Time near the Epicenter (1): 17 Apr 2026 11:12:56 Time in your area (1): 17 Apr 2026 13:12:56
Location	51.934N 176.294E
Depth	4 km
Distances	234.7 km (145.5 mi) ESE of Attu Station, Alaska 1118.5 km (693.5 mi) ESE of Klyuchi, Russia 1203.2 km (746.0 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1218.6 km (755.5 mi) ESE of Vilyuchinsk, Russia 1219.5 km (756.1 mi) ESE of Yelizovo, Russia
Location Uncertainty	Horizontal: 30.5 km; Vertical 5.9 km
Parameters	Nph = 18; Dmin = 155.7 km; Rmss = 0.40 seconds; Gp = 196° Version =
Event ID	ak a2026hofelp

(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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