M 4.7 earthquake: North Pacific Ocean (Japan) — August 17, 1977

M 4.7 earthquake: North Pacific Ocean (Japan) — August 17, 1977. Epicenter 737 km S of Hamamatsu, depth 424 km, 22:08 Local (1977-08-17 13:08 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (737 km S, Japan) — 28.258, 139.489

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