M 4.5 earthquake: North Pacific Ocean (Japan) — September 20, 1984

M 4.5 earthquake: North Pacific Ocean (Japan) — September 20, 1984. Epicenter 825 km S of Hamamatsu, depth 448 km, 10:12 Local (1984-09-20 01:12 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (825 km S, Japan) — 27.538, 139.929

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