M 4.9 earthquake: South Pacific Ocean (Tonga) — May 20, 1997

M 4.9 earthquake: South Pacific Ocean (Tonga) — May 20, 1997. Epicenter 539 km SW of Nuku'alofa, depth 550 km, 21:29 Local (1997-05-21 09:29 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (539 km SW, Tonga) — -23.225, -179.944

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