M 4.9 earthquake: North Pacific Ocean (Japan) — December 23, 1991

M 4.9 earthquake: North Pacific Ocean (Japan) — December 23, 1991. Epicenter 630 km E of Kushiro, depth 33 km, 20:18 Local (1991-12-23 10:18 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (630 km E, Japan) — 44.696, 151.86

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