M 4.5 earthquake: South Pacific Ocean (Tonga) — September 21, 1981

M 4.5 earthquake: South Pacific Ocean (Tonga) — September 21, 1981. Epicenter 366 km W of Neiafu, depth 193 km, 19:23 Local (1981-09-22 07:23 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

South Pacific Ocean (366 km W, Tonga) — -18.086, -177.4

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