M 6.4 earthquake: South Pacific Ocean (Tonga) — March 20, 1961

M 6.4 earthquake: South Pacific Ocean (Tonga) — March 20, 1961. Epicenter 328 km S of Nuku'alofa, depth 25 km, 11:42 Local (1961-03-20 23:42 UTC). Shaking felt by ~43K people. Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (328 km S, Tonga) — -24.06, -175.694

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