M 6.4 earthquake: South Pacific Ocean (Tonga) — December 28, 1973

M 6.4 earthquake: South Pacific Ocean (Tonga) — December 28, 1973. Epicenter 581 km SW of Nuku'alofa, depth 549 km, 17:31 Local (1973-12-28 05:31 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (581 km SW, Tonga) — -23.871, 179.96

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