M 4.5 earthquake: South Pacific Ocean (Tonga) — September 9, 1978

M 4.5 earthquake: South Pacific Ocean (Tonga) — September 9, 1978. Epicenter 377 km W of Nuku'alofa, depth 625 km, 21:37 Local (1978-09-09 09:37 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (377 km W, Tonga) — -20.778, -178.827

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