M 4.5 earthquake: North Pacific Ocean (Japan) — February 21, 1988

M 4.5 earthquake: North Pacific Ocean (Japan) — February 21, 1988. Epicenter 662 km S of Hamamatsu, depth 434 km, 10:05 Local (1988-02-21 01:05 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (662 km S, Japan) — 28.912, 139.307

EarthquakeLive.org