M 4.7 earthquake: North Pacific Ocean (Japan) — February 20, 1975

M 4.7 earthquake: North Pacific Ocean (Japan) — February 20, 1975. Epicenter 455 km S of Hamamatsu, depth 452 km, 13:02 Local (1975-02-20 04:02 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (455 km S, Japan) — 30.657, 138.284

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