M 4.7 earthquake: North Pacific Ocean (Japan) — September 20, 1978

M 4.7 earthquake: North Pacific Ocean (Japan) — September 20, 1978. Epicenter 266 km SE of Yokohama, depth 63 km, 19:05 Local (1978-09-20 10:05 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (266 km SE, Japan) — 33.342, 141.009

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