M 5.8 earthquake: North Pacific Ocean (Japan) — May 13, 1977

M 5.8 earthquake: North Pacific Ocean (Japan) — May 13, 1977. Epicenter 720 km S of Hamamatsu, depth 430 km, 20:13 Local (1977-05-13 11:13 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (720 km S, Japan) — 28.424, 139.502

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