M 5.7 earthquake: Aleutian Islands (Nikolski, USA) — July 21, 1971

M 5.7 earthquake: Aleutian Islands (Nikolski, USA) — July 21, 1971. Epicenter 158 km SW of Nikolski, depth 36 km, 02:03 Local (1971-07-21 12:03 UTC). Shaking felt by ~18 people. Readings from every reporting agency, affected towns, aftershock sequence.

Aleutian Islands (158 km SW of Nikolski, USA) — 51.946, -170.54

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