M 4.6 earthquake: South Pacific Ocean (Tonga) — September 21, 1978

M 4.6 earthquake: South Pacific Ocean (Tonga) — September 21, 1978. Epicenter 360 km W of Nuku'alofa, depth 582 km, 18:24 Local (1978-09-21 06:24 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (360 km W, Tonga) — -20.764, -178.661

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