M 4.7 earthquake: South Pacific Ocean (Tonga) — May 4, 1977

M 4.7 earthquake: South Pacific Ocean (Tonga) — May 4, 1977. Epicenter 345 km W of Nuku'alofa, depth 587 km, 20:17 Local (1977-05-04 08:17 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (345 km W, Tonga) — -20.311, -178.416

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