M 4.6 earthquake: North Pacific Ocean (Japan) — September 20, 1986

M 4.6 earthquake: North Pacific Ocean (Japan) — September 20, 1986. Epicenter 461 km S of Hamamatsu, depth 491 km, 21:24 Local (1986-09-20 12:24 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (461 km S, Japan) — 30.577, 137.83

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