M 5.4 earthquake: North Pacific Ocean (Japan) — October 7, 1986

M 5.4 earthquake: North Pacific Ocean (Japan) — October 7, 1986. Epicenter 313 km S of Hamamatsu, depth 400 km, 20:40 Local (1986-10-07 11:40 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (313 km S, Japan) — 31.907, 137.676

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