M 5.4 Earthquake: South Pacific Ocean (Tonga) — August 21, 1988

M 5.4 Earthquake: South Pacific Ocean (Tonga) — August 21, 1988. Epicenter 359 km SW of Nuku'alofa, depth 102 km, 23:12 Local (1988-08-22 11:12 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (359 km SW, Tonga) — -24.016, -176.804

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