2025-03-21 09:57:16 (M4.0) Andreanof Islands, Aleutian Islands, Alaska 51.4 -176.1 (90be5)

M4.0 Earthquake - Andreanof Islands, Aleutian Islands, Alaska

Preliminary Report

Magnitude	4.0
Date-Time	Universal Time (UTC): 21 Mar 2025 09:57:17 Time near the Epicenter (1): 20 Mar 2025 23:57:17 Time in your area (1): 21 Mar 2025 01:57:17
Location	51.403N 176.096W
Depth	46 km
Distances	64.2 km (39.8 mi) SE of Adak, Alaska 1530.1 km (948.6 mi) SSE of Anadyr, Russia 1603.5 km (994.2 mi) ESE of Klyuchi, Russia 1727.6 km (1071.1 mi) ESE of Petropavlovsk-Kamchatsky, Russia 1743.1 km (1080.7 mi) ESE of Yelizovo, Russia
Location Uncertainty	Horizontal: 7.5 km; Vertical 9.7 km
Parameters	Nph = 50; Dmin = 77.0 km; Rmss = 1.32 seconds; Gp = 191° Version =
Event ID	us 7000plkc

(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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