M 4.6 earthquake: North Pacific Ocean (Japan) — April 13, 1983

M 4.6 earthquake: North Pacific Ocean (Japan) — April 13, 1983. Epicenter 281 km E of Kushiro, depth 33 km, 18:56 Local (1983-04-13 09:56 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (281 km E, Japan) — 43.558, 147.752

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