M 4.9 earthquake: North Pacific Ocean (Japan) — April 25, 1978

M 4.9 earthquake: North Pacific Ocean (Japan) — April 25, 1978. Epicenter 309 km S of Hamamatsu, depth 343 km, 16:01 Local (1978-04-25 07:01 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (309 km S, Japan) — 31.946, 137.992

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