M 4.6 earthquake: North Pacific Ocean (Japan) — August 6, 1983

M 4.6 earthquake: North Pacific Ocean (Japan) — August 6, 1983. Epicenter 843 km SE of Yokohama, depth 33 km, 05:45 Local (1983-08-05 19:45 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (843 km SE, Japan) — 28.427, 143.029

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