M 4.6 Earthquake: North Pacific Ocean (Japan) — May 22, 1977

M 4.6 Earthquake: North Pacific Ocean (Japan) — May 22, 1977. Epicenter 537 km S of Hamamatsu, depth 431 km, 11:06 Local (1977-05-22 02:06 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (537 km S, Japan) — 29.962, 138.706

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