2021-12-09 23:49:29 (M4.2) Rat Islands, Aleutian Islands, Alaska 51.2 179.6 (1cbfb)

[ens@xxxxxxxxxxxx (USGS ENS)]

M4.2 Earthquake - Rat Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	4.2
Date-Time	9 Dec 2021 23:49:29 UTC 9 Dec 2021 13:49:29 near epicenter 9 Dec 2021 15:49:29 standard time in your timezone
Location	51.191N 179.625E
Depth	35 km
Distances	270.5 km (167.7 mi) WSW of Adak, Alaska 1358.2 km (842.1 mi) ESE of Klyuchi, Russia 1447.6 km (897.5 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1462.7 km (906.9 mi) ESE of Vilyuchinsk, Russia 1464.1 km (907.7 mi) ESE of Yelizovo, Russia
Location Uncertainty	Horizontal: 5.3 km; Vertical 2.0 km
Parameters	Nph = 13; Dmin = 79.1 km; Rmss = 0.76 seconds; Gp = 225° Version =
Event ID	us 6000gb18

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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