M 5.5 earthquake: South Pacific Ocean (Tonga) — April 15, 1973

M 5.5 earthquake: South Pacific Ocean (Tonga) — April 15, 1973. Epicenter 379 km W of Nuku'alofa, depth 610 km, 18:10 Local (1973-04-15 06:10 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (379 km W, Tonga) — -20.613, -178.825

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