M 4.8 earthquake: North Pacific Ocean (Japan) — May 7, 1978

M 4.8 earthquake: North Pacific Ocean (Japan) — May 7, 1978. Epicenter 546 km S of Hamamatsu, depth 510 km, 18:39 Local (1978-05-07 09:39 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (546 km S, Japan) — 29.807, 137.799

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