M 5.0 earthquake: South Pacific Ocean (Tonga) — January 20, 1977

M 5.0 earthquake: South Pacific Ocean (Tonga) — January 20, 1977. Epicenter 359 km W of Nuku'alofa, depth 634 km, 02:55 Local (1977-01-19 14:55 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (359 km W, Tonga) — -20.799, -178.659

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