M 4.6 earthquake: North Pacific Ocean (Japan) — February 6, 1977

M 4.6 earthquake: North Pacific Ocean (Japan) — February 6, 1977. Epicenter 510 km S of Hamamatsu, depth 429 km, 12:22 Local (1977-02-06 03:22 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (510 km S, Japan) — 30.231, 138.841

EarthquakeLive.org