M 4.9 earthquake: Aleutian Islands (Atka, USA) — April 21, 1974

M 4.9 earthquake: Aleutian Islands (Atka, USA) — April 21, 1974. Epicenter 129 km W of Atka, depth 70 km, 16:29 Local (1974-04-22 02:29 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Aleutian Islands (129 km W of Atka, USA) — 51.985, -176.057

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