M 5.5 earthquake: South Pacific Ocean (Tonga) — September 23, 1987

M 5.5 earthquake: South Pacific Ocean (Tonga) — September 23, 1987. Epicenter 445 km W of Nuku'alofa, depth 593 km, 18:03 Local (1987-09-24 06:03 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (445 km W, Tonga) — -21.841, -179.454

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