M 4.6 earthquake: North Pacific Ocean (Japan) — March 20, 1974

M 4.6 earthquake: North Pacific Ocean (Japan) — March 20, 1974. Epicenter 669 km SE of Hamamatsu, depth 109 km, 12:50 Local (1974-03-20 03:50 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (669 km SE, Japan) — 29.341, 140.911

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