M 5.5 earthquake: South Pacific Ocean (Tonga) — January 21, 1973

M 5.5 earthquake: South Pacific Ocean (Tonga) — January 21, 1973. Epicenter 311 km N of Neiafu, depth 129 km, 08:20 Local (1973-01-21 20:20 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (311 km N, Tonga) — -15.857, -174.055

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