M 4.5 earthquake: North Pacific Ocean (Japan) — August 21, 1977

M 4.5 earthquake: North Pacific Ocean (Japan) — August 21, 1977. Epicenter 779 km SE of Yokohama, depth 33 km, 13:39 Local (1977-08-21 03:39 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (779 km SE, Japan) — 29.01, 142.924

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