M 4.6 earthquake: North Pacific Ocean (Japan) — December 20, 1973

M 4.6 earthquake: North Pacific Ocean (Japan) — December 20, 1973. Epicenter 361 km NE of Kushiro, depth 56 km, 22:33 Local (1973-12-20 12:33 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (361 km NE, Japan) — 44.513, 148.339

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