M 5.0 earthquake: North Pacific Ocean (Japan) — October 31, 1983

M 5.0 earthquake: North Pacific Ocean (Japan) — October 31, 1983. Epicenter 496 km SE of Wakayama, depth 507 km, 10:54 Local (1983-10-31 01:54 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (496 km SE, Japan) — 30.166, 137.371

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