M 4.6 earthquake: South Pacific Ocean (Tonga) — January 7, 1991

M 4.6 earthquake: South Pacific Ocean (Tonga) — January 7, 1991. Epicenter 344 km W of Nuku'alofa, depth 540 km, 11:42 Local (1991-01-06 23:42 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (344 km W, Tonga) — -20.875, -178.523

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