2025-09-21 09:30:27 UPDATED: (M5.6) Andreanof Islands, Aleutian Islands, Alaska 51.2 -178.0 (70fa9)

M5.6 Earthquake - Andreanof Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	5.6
Date-Time	Universal Time (UTC): 21 Sep 2025 09:30:28 Time near the Epicenter (1): 20 Sep 2025 23:30:28 Time in your area (1): 21 Sep 2025 15:00:28
Location	51.174N 178.008W
Depth	19 km
Distances	123.1 km (76.3 mi) SW of Adak, Alaska 1500.5 km (930.3 mi) ESE of Klyuchi, Russia 1532.5 km (950.2 mi) S of Anadyr, Russia 1606.8 km (996.2 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1622.4 km (1005.9 mi) ESE of Vilyuchinsk, Russia
Location Uncertainty	Horizontal: 0.0 km; Vertical 0.3 km
Parameters	Nph = 98; Dmin = 0.0 km; Rmss = 0.57 seconds; Gp = 0° Version = 1
Event ID	ak 025c4rf0bd

(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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