M 4.7 earthquake: South Pacific Ocean (Tonga) — August 20, 1987

M 4.7 earthquake: South Pacific Ocean (Tonga) — August 20, 1987. Epicenter 361 km W of Nuku'alofa, depth 343 km, 03:00 Local (1987-08-19 15:00 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (361 km W, Tonga) — -20.195, -178.539

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