M 5.1 earthquake: South Pacific Ocean (Tonga) — May 20, 1973

M 5.1 earthquake: South Pacific Ocean (Tonga) — May 20, 1973. Epicenter 305 km W of Nuku'alofa, depth 550 km, 16:59 Local (1973-05-21 04:59 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (305 km W, Tonga) — -20.21, -177.981

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