M 4.7 earthquake: South Pacific Ocean (Tonga) — June 20, 1977

M 4.7 earthquake: South Pacific Ocean (Tonga) — June 20, 1977. Epicenter 331 km N of Neiafu, depth 306 km, 20:58 Local (1977-06-21 08:58 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (331 km N, Tonga) — -15.763, -174.755

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