M 5.3 earthquake: North Atlantic Ocean (Portugal) — May 3, 1991

M 5.3 earthquake: North Atlantic Ocean (Portugal) — May 3, 1991. Epicenter 1615 km SW of Horta, depth 10 km, 20:56 Local (1991-05-03 23:56 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1615 km SW, Portugal) — 29.811, -42.721

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