M 4.7 earthquake: South Pacific Ocean (Tonga) — December 18, 1983

M 4.7 earthquake: South Pacific Ocean (Tonga) — December 18, 1983. Epicenter 616 km SW of Nuku'alofa, depth 662 km, 15:35 Local (1983-12-18 03:35 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (616 km SW, Tonga) — -23.946, 179.613

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