M 5.7 earthquake: North Atlantic Ocean (Portugal) — October 11, 1983

M 5.7 earthquake: North Atlantic Ocean (Portugal) — October 11, 1983. Epicenter 1942 km SW of Horta, depth 10 km, 19:41 Local (1983-10-11 22:41 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1942 km SW, Portugal) — 27.157, -44.497

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