M 4.5 earthquake: Aleutian Islands (Atka, USA) — September 20, 1973

M 4.5 earthquake: Aleutian Islands (Atka, USA) — September 20, 1973. Epicenter 67 km S of Atka, depth 39 km, 08:58 Local (1973-09-20 18:58 UTC). Shaking felt by ~61 people. Readings from every reporting agency, affected towns, aftershock sequence.

Aleutian Islands (67 km S of Atka, USA) — 51.63, -173.867

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