M 5.4 earthquake: North Pacific Ocean (Japan) — May 4, 1988

M 5.4 earthquake: North Pacific Ocean (Japan) — May 4, 1988. Epicenter 428 km NE of Kushiro, depth 39 km, 06:28 Local (1988-05-03 20:28 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (428 km NE, Japan) — 44.497, 149.265

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