M 5.4 earthquake: South Pacific Ocean (Tonga) — July 20, 1979

M 5.4 earthquake: South Pacific Ocean (Tonga) — July 20, 1979. Epicenter 335 km W of Nuku'alofa, depth 558 km, 13:10 Local (1979-07-20 01:10 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (335 km W, Tonga) — -20.474, -178.369

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