M 4.6 earthquake: North Pacific Ocean (Japan) — April 19, 1977

M 4.6 earthquake: North Pacific Ocean (Japan) — April 19, 1977. Epicenter 800 km S of Hamamatsu, depth 33 km, 07:59 Local (1977-04-18 22:59 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (800 km S, Japan) — 27.98, 140.7

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