M 4.9 earthquake: South Pacific Ocean (Tonga) — March 18, 1973

M 4.9 earthquake: South Pacific Ocean (Tonga) — March 18, 1973. Epicenter 471 km W of Nuku'alofa, depth 566 km, 07:46 Local (1973-03-18 19:46 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (471 km W, Tonga) — -22.142, -179.651

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