M 4.6 earthquake: North Pacific Ocean (Japan) — March 20, 1985

M 4.6 earthquake: North Pacific Ocean (Japan) — March 20, 1985. Epicenter 502 km S of Hamamatsu, depth 472 km, 13:55 Local (1985-03-20 04:55 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (502 km S, Japan) — 30.375, 139.194

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