M 4.6 earthquake: North Pacific Ocean (Japan) — December 23, 1978

M 4.6 earthquake: North Pacific Ocean (Japan) — December 23, 1978. Epicenter 283 km E of Morioka, depth 33 km, 10:39 Local (1978-12-23 01:39 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (283 km E, Japan) — 38.931, 144.26

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