M 4.6 earthquake: South Pacific Ocean (Tonga) — August 4, 1987

M 4.6 earthquake: South Pacific Ocean (Tonga) — August 4, 1987. Epicenter 293 km W of Nuku'alofa, depth 246 km, 23:18 Local (1987-08-04 10:18 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (293 km W, Tonga) — -20.663, -177.996

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