M 5.5 earthquake near Niigata, Japan — 1971-09-21

Magnitude 5.5 earthquake near 71 km S of Niigata (Japan), depth 182 km, 17:43 Local (1971-09-21 08:43 UTC). Shaking felt by ~9.7M people. Readings from every reporting agency, affected towns, aftershock sequence.

71 km S of Niigata (Japan) — 37.326, 138.748

EarthquakeLive.org