M 5.5 earthquake: North Pacific Ocean (Japan) — March 30, 1978

M 5.5 earthquake: North Pacific Ocean (Japan) — March 30, 1978. Epicenter 848 km SE of Hamamatsu, depth 22 km, 02:51 Local (1978-03-29 17:51 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (848 km SE, Japan) — 27.92, 141.783

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