M 4.6 earthquake: North Pacific Ocean (Japan) — December 20, 1985

M 4.6 earthquake: North Pacific Ocean (Japan) — December 20, 1985. Epicenter 789 km S of Hamamatsu, depth 33 km, 10:59 Local (1985-12-20 01:59 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (789 km S, Japan) — 28.086, 140.685

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