M 4.6 earthquake: North Pacific Ocean (Japan) — September 20, 1987

M 4.6 earthquake: North Pacific Ocean (Japan) — September 20, 1987. Epicenter 272 km NE of Kushiro, depth 33 km, 10:35 Local (1987-09-20 01:35 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (272 km NE, Japan) — 44.084, 147.378

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