M 6.4 earthquake: South Pacific Ocean (Tonga) — April 21, 1984

M 6.4 earthquake: South Pacific Ocean (Tonga) — April 21, 1984. Epicenter 437 km W of Nuku'alofa, depth 593 km, 15:33 Local (1984-04-22 03:33 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (437 km W, Tonga) — -21.866, -179.375

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