M 5.5 earthquake: Aleutian Islands (Atka, USA) — February 11, 1971

M 5.5 earthquake: Aleutian Islands (Atka, USA) — February 11, 1971. Epicenter 234 km SW of Atka, depth 35 km, 01:55 Local (1971-02-11 12:55 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Aleutian Islands (234 km SW of Atka, USA) — 51.12, -177.114

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