2025-12-09 04:30:00 (M5.0) Rat Islands, Aleutian Islands, Alaska 51.2 178.6 (70fa9)

M5.0 Earthquake - Rat Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	5.0
Date-Time	Universal Time (UTC): 9 Dec 2025 04:30:01 Time near the Epicenter (1): 8 Dec 2025 18:30:01 Time in your area (1): 9 Dec 2025 10:00:01
Location	51.235N 178.623E
Depth	5 km
Distances	336.5 km (208.6 mi) WSW of Adak, Alaska 1296.4 km (803.8 mi) ESE of Klyuchi, Russia 1379.1 km (855.0 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1394.0 km (864.3 mi) ESE of Vilyuchinsk, Russia 1395.7 km (865.3 mi) ESE of Yelizovo, Russia
Location Uncertainty	Horizontal: 0.0 km; Vertical 0.0 km
Parameters	Nph = 55; Dmin = 44.5 km; Rmss = 1.10 seconds; Gp = 222° Version =
Event ID	ak 2025yedhrn

(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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