M 4.7 earthquake: South Pacific Ocean (Tonga) — April 21, 1986

M 4.7 earthquake: South Pacific Ocean (Tonga) — April 21, 1986. Epicenter 321 km W of Nuku'alofa, depth 550 km, 08:10 Local (1986-04-21 20:10 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (321 km W, Tonga) — -20.897, -178.303

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