M 4.5 earthquake: North Pacific Ocean (Japan) — August 21, 1986

M 4.5 earthquake: North Pacific Ocean (Japan) — August 21, 1986. Epicenter 830 km S of Hamamatsu, depth 469 km, 12:00 Local (1986-08-21 03:00 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (830 km S, Japan) — 27.504, 139.967

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