M 4.5 earthquake: North Atlantic Ocean (Portugal) — May 3, 1991

M 4.5 earthquake: North Atlantic Ocean (Portugal) — May 3, 1991. Epicenter 1635 km SW of Horta, depth 10 km, 21:02 Local (1991-05-04 00:02 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1635 km SW, Portugal) — 29.631, -42.823

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