M 4.6 earthquake: North Pacific Ocean (Japan) — December 23, 1991

M 4.6 earthquake: North Pacific Ocean (Japan) — December 23, 1991. Epicenter 307 km SE of Yokohama, depth 33 km, 01:00 Local (1991-12-22 16:00 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (307 km SE, Japan) — 33.344, 141.789

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