M 4.9 earthquake: South Pacific Ocean (Tonga) — February 28, 1975

M 4.9 earthquake: South Pacific Ocean (Tonga) — February 28, 1975. Epicenter 352 km SW of Nuku'alofa, depth 270 km, 17:50 Local (1975-03-01 05:50 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (352 km SW, Tonga) — -23.277, -177.736

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