M 4.5 earthquake: North Pacific Ocean (Japan) — April 20, 1989

M 4.5 earthquake: North Pacific Ocean (Japan) — April 20, 1989. Epicenter 666 km S of Hamamatsu, depth 470 km, 20:28 Local (1989-04-20 11:28 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (666 km S, Japan) — 28.858, 139.185

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