M 5.1 earthquake: South Pacific Ocean (Tonga) — September 21, 1978

M 5.1 earthquake: South Pacific Ocean (Tonga) — September 21, 1978. Epicenter 374 km W of Nuku'alofa, depth 588 km, 19:45 Local (1978-09-21 07:45 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (374 km W, Tonga) — -20.893, -178.81

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