M 4.5 earthquake: South Pacific Ocean (Tonga) — April 4, 1997

M 4.5 earthquake: South Pacific Ocean (Tonga) — April 4, 1997. Epicenter 554 km SW of Nuku'alofa, depth 500 km, 19:17 Local (1997-04-05 07:17 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (554 km SW, Tonga) — -23.533, -179.947

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