M 5.7 earthquake: South Pacific Ocean (Tonga) — May 4, 1987

M 5.7 earthquake: South Pacific Ocean (Tonga) — May 4, 1987. Epicenter 350 km W of Nuku'alofa, depth 569 km, 04:46 Local (1987-05-03 16:46 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (350 km W, Tonga) — -20.833, -178.577

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