2023-12-21 14:55:58 UPDATED: (M6.3) Andreanof Islands, Aleutian Islands, Alaska 51.3 -175.4 (70fa9)

M6.3 Earthquake - Andreanof Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	6.3
Date-Time	Universal Time (UTC): 21 Dec 2023 14:55:59 Time near the Epicenter (1): 21 Dec 2023 04:55:59 Time in your area (1): 21 Dec 2023 20:25:59
Location	51.334N 175.358W
Depth	33 km
Distances	106.8 km (66.2 mi) SE of Adak, Alaska 1548.4 km (960.0 mi) SSE of Anadyr, Russia 1652.2 km (1024.4 mi) ESE of Klyuchi, Russia 1779.1 km (1103.0 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1794.5 km (1112.6 mi) ESE of Yelizovo, Russia
Location Uncertainty	Horizontal: 4.7 km; Vertical 4.2 km
Parameters	Nph = 96; Dmin = 82.5 km; Rmss = 0.91 seconds; Gp = 88° Version =
Event ID	us d0010b4f ***This event supersedes event AK023gbcg6o5.

(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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