M 4.8 earthquake: North Pacific Ocean (Japan) — May 3, 1977

M 4.8 earthquake: North Pacific Ocean (Japan) — May 3, 1977. Epicenter 850 km S of Hamamatsu, depth 312 km, 12:15 Local (1977-05-03 03:15 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (850 km S, Japan) — 27.375, 140.198

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