M 4.8 earthquake: North Pacific Ocean (Japan) — September 17, 1977

M 4.8 earthquake: North Pacific Ocean (Japan) — September 17, 1977. Epicenter 490 km SE of Hamamatsu, depth 173 km, 19:47 Local (1977-09-17 10:47 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (490 km SE, Japan) — 30.833, 140.213

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