2026-10-21 10:46:01 (M4.0) Unimak Island region, Alaska 53.0 -163.5 (90be5)

M4.0 Earthquake - Unimak Island region, Alaska

Preliminary Report

Magnitude	4.0
Date-Time	Universal Time (UTC): 21 Oct 2026 10:46:02 Time near the Epicenter (1): 21 Oct 2026 00:46:02 Time in your area (1): 21 Oct 2026 02:46:02
Location	53.050N 163.452W
Depth	28 km
Distances	195.5 km (121.2 mi) SE of Akutan, Alaska 1220.3 km (756.6 mi) SW of Anchorage, Alaska 1241.3 km (769.6 mi) SW of Eagle River, Alaska 1254.3 km (777.7 mi) SW of Knik-Fairview, Alaska 1688.8 km (1047.1 mi) SSE of Anadyr, Russia
Location Uncertainty	Horizontal: 7.2 km; Vertical 9.6 km
Parameters	Nph = 116; Dmin = 177.9 km; Rmss = 0.80 seconds; Gp = 219° Version =
Event ID	ak a2026uvzyoa

(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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