M 4.6 earthquake: North Pacific Ocean (Japan) — January 21, 1973

M 4.6 earthquake: North Pacific Ocean (Japan) — January 21, 1973. Epicenter 758 km S of Hamamatsu, depth 452 km, 03:25 Local (1973-01-20 18:25 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (758 km S, Japan) — 28.158, 139.891

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