M 6.4 earthquake: Aleutian Islands (Atka, USA) — July 22, 1957

M 6.4 earthquake: Aleutian Islands (Atka, USA) — July 22, 1957. Epicenter 230 km SW of Atka, depth 25 km, 13:45 Local (1957-07-23 00:45 UTC). Shaking felt by ~61 people. Readings from every reporting agency, affected towns, aftershock sequence.

Aleutian Islands (230 km SW of Atka, USA) — 51.283, -177.204

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