M 7.4 earthquake: South Pacific Ocean (Tonga) — September 28, 1957

M 7.4 earthquake: South Pacific Ocean (Tonga) — September 28, 1957. Epicenter 332 km W of Nuku'alofa, depth 587 km, 02:20 Local (1957-09-28 14:20 UTC). Shaking felt by ~940K people. Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (332 km W, Tonga) — -20.541, -178.349

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