2026-08-03 03:04:48 (M3.9) Rat Islands, Aleutian Islands, Alaska 52.0 176.2 (90be5)

M3.9 Earthquake - Rat Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	3.9
Date-Time	Universal Time (UTC): 3 Aug 2026 03:04:48 Time near the Epicenter (1): 2 Aug 2026 17:04:48 Time in your area (1): 2 Aug 2026 19:04:48
Location	51.962N 176.235E
Depth	89 km
Distances	229.6 km (142.4 mi) ESE of Attu Station, Alaska 1113.4 km (690.3 mi) ESE of Klyuchi, Russia 1198.6 km (743.1 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1214.0 km (752.7 mi) ESE of Vilyuchinsk, Russia 1214.8 km (753.2 mi) ESE of Yelizovo, Russia
Location Uncertainty	Horizontal: 34.3 km; Vertical 15.3 km
Parameters	Nph = 16; Dmin = 155.7 km; Rmss = 0.70 seconds; Gp = 195° Version =
Event ID	ak a2026pfmwbu

(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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