M 4.5 earthquake: South Pacific Ocean (Tonga) — July 21, 1983

M 4.5 earthquake: South Pacific Ocean (Tonga) — July 21, 1983. Epicenter 313 km SW of Nuku'alofa, depth 390 km, 19:45 Local (1983-07-22 07:45 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (313 km SW, Tonga) — -22.345, -177.962

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