M 5.4 earthquake: North Pacific Ocean (Japan) — September 13, 1990

M 5.4 earthquake: North Pacific Ocean (Japan) — September 13, 1990. Epicenter 250 km SE of Yokohama, depth 51 km, 11:58 Local (1990-09-13 02:58 UTC). Shaking felt by ~715K people. Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (250 km SE, Japan) — 33.495, 140.992

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