M 4.9 earthquake: North Pacific Ocean (Japan) — April 20, 1986

M 4.9 earthquake: North Pacific Ocean (Japan) — April 20, 1986. Epicenter 795 km S of Yokohama, depth 33 km, 00:57 Local (1986-04-19 14:57 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (795 km S, Japan) — 28.733, 142.566

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