M 5.5 earthquake: South Pacific Ocean (Tonga) — May 15, 1977

M 5.5 earthquake: South Pacific Ocean (Tonga) — May 15, 1977. Epicenter 340 km NW of Nuku'alofa, depth 499 km, 11:12 Local (1977-05-15 23:12 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (340 km NW, Tonga) — -19.131, -177.672

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