M 5.4 earthquake: North Pacific Ocean (Japan) — April 12, 1983

M 5.4 earthquake: North Pacific Ocean (Japan) — April 12, 1983. Epicenter 309 km NE of Kushiro, depth 97 km, 01:34 Local (1983-04-11 15:34 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (309 km NE, Japan) — 44.29, 147.751

EarthquakeLive.org