M 4.5 earthquake: North Pacific Ocean (Japan) — July 20, 1983

M 4.5 earthquake: North Pacific Ocean (Japan) — July 20, 1983. Epicenter 485 km S of Hamamatsu, depth 427 km, 02:07 Local (1983-07-19 17:07 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (485 km S, Japan) — 30.395, 138.421

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