M 4.7 earthquake: North Pacific Ocean (Japan) — August 20, 1984

M 4.7 earthquake: North Pacific Ocean (Japan) — August 20, 1984. Epicenter 461 km S of Hamamatsu, depth 417 km, 22:49 Local (1984-08-20 13:49 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (461 km S, Japan) — 30.628, 138.555

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