M 4.6 earthquake: North Pacific Ocean (Japan) — October 9, 1991

M 4.6 earthquake: North Pacific Ocean (Japan) — October 9, 1991. Epicenter 304 km S of Hamamatsu, depth 391 km, 15:58 Local (1991-10-09 06:58 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (304 km S, Japan) — 31.985, 137.813

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