M 4.5 earthquake: South Pacific Ocean (Tonga) — October 20, 1977

M 4.5 earthquake: South Pacific Ocean (Tonga) — October 20, 1977. Epicenter 259 km N of Neiafu, depth 138 km, 05:03 Local (1977-10-19 16:03 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (259 km N, Tonga) — -16.318, -174.015

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