M 5.1 earthquake: Aleutian Islands (Atka, USA) — October 21, 1987

M 5.1 earthquake: Aleutian Islands (Atka, USA) — October 21, 1987. Epicenter 436 km W of Atka, depth 95 km, 08:47 Local (1987-10-21 17:47 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Aleutian Islands (436 km W of Atka, USA) — 51.937, 179.439

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