M 5.0 earthquake: North Pacific Ocean (Japan) — March 31, 1978

M 5.0 earthquake: North Pacific Ocean (Japan) — March 31, 1978. Epicenter 274 km S of Yokohama, depth 68 km, 22:37 Local (1978-03-31 13:37 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (274 km S, Japan) — 33.089, 140.519

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