M 5.4 earthquake: South Pacific Ocean (Tonga) — March 22, 1991

M 5.4 earthquake: South Pacific Ocean (Tonga) — March 22, 1991. Epicenter 283 km W of Nuku'alofa, depth 527 km, 09:08 Local (1991-03-21 20:08 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (283 km W, Tonga) — -20.878, -177.93

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