M 4.6 earthquake: Aleutian Islands (Atka, USA) — March 21, 1991

M 4.6 earthquake: Aleutian Islands (Atka, USA) — March 21, 1991. Epicenter 277 km W of Atka, depth 33 km, 06:19 Local (1991-03-21 16:19 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Aleutian Islands (277 km W of Atka, USA) — 51.458, -178.043

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