2026-10-21 12:03:56 (M4.5) Unimak Island region, Alaska 53.4 -163.5 (90be5)

M4.5 Earthquake - Unimak Island region, Alaska

Preliminary Report

Magnitude	4.5
Date-Time	Universal Time (UTC): 21 Oct 2026 12:03:56 Time near the Epicenter (1): 21 Oct 2026 02:03:56 Time in your area (1): 21 Oct 2026 04:03:56
Location	53.426N 163.461W
Depth	20 km
Distances	159.0 km (98.6 mi) S of False Pass, Alaska 1187.3 km (736.1 mi) SW of Anchorage, Alaska 1208.4 km (749.2 mi) SW of Eagle River, Alaska 1221.0 km (757.0 mi) SW of Knik-Fairview, Alaska 1653.2 km (1025.0 mi) SSE of Anadyr, Russia
Location Uncertainty	Horizontal: 5.9 km; Vertical 5.7 km
Parameters	Nph = 97; Dmin = 144.9 km; Rmss = 0.76 seconds; Gp = 167° Version =
Event ID	us 6000u3tn

(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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