M 4.5 earthquake: North Pacific Ocean (USA) — April 21, 1977

M 4.5 earthquake: North Pacific Ocean (USA) — April 21, 1977. Epicenter 418 km W of Coos Bay, depth 15 km, 23:32 Local (1977-04-22 08:32 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (418 km W, USA) — 44.254, -129.278

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