M 5.5 earthquake: Aleutian Islands (Nikolski, USA) — May 9, 1971

M 5.5 earthquake: Aleutian Islands (Nikolski, USA) — May 9, 1971. Epicenter 178 km SW of Nikolski, depth 53 km, 14:01 Local (1971-05-10 00:01 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

Aleutian Islands (178 km SW of Nikolski, USA) — 51.953, -170.945

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