M 4.7 earthquake: South Pacific Ocean (Tonga) — March 17, 1977

M 4.7 earthquake: South Pacific Ocean (Tonga) — March 17, 1977. Epicenter 387 km W of Nuku'alofa, depth 621 km, 05:41 Local (1977-03-16 17:41 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (387 km W, Tonga) — -20.882, -178.943

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