2023-08-21 14:45:05 UPDATED: (M3.9) Rat Islands, Aleutian Islands, Alaska 51.8 180.0 (90be5)

M3.9 Earthquake - Rat Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	3.9
Date-Time	Universal Time (UTC): 21 Aug 2023 14:45:05 Time near the Epicenter (1): 21 Aug 2023 04:45:05 Time in your area (1): 21 Aug 2023 06:45:05
Location	51.766N 179.979E
Depth	19 km
Distances	233.9 km (145.0 mi) W of Adak, Alaska 1346.4 km (834.8 mi) ESE of Klyuchi, Russia 1451.4 km (899.9 mi) S of Anadyr, Russia 1454.5 km (901.8 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1470.2 km (911.6 mi) ESE of Vilyuchinsk, Russia
Location Uncertainty	Horizontal: 4.3 km; Vertical 5.4 km
Parameters	Nph = 43; Dmin = 25.7 km; Rmss = 0.89 seconds; Gp = 122° Version =
Event ID	us 7000kpxa ***This event supersedes event AK023apktl63.

(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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