M 4.9 earthquake: South Pacific Ocean (Tonga) — January 18, 1977

M 4.9 earthquake: South Pacific Ocean (Tonga) — January 18, 1977. Epicenter 578 km SW of Nuku'alofa, depth 505 km, 10:43 Local (1977-01-17 22:43 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (578 km SW, Tonga) — -23.767, 179.927

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