M 5.3 earthquake: North Atlantic Ocean (Portugal) — March 23, 1991

M 5.3 earthquake: North Atlantic Ocean (Portugal) — March 23, 1991. Epicenter 1060 km SW of Horta, depth 10 km, 05:41 Local (1991-03-23 08:41 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1060 km SW, Portugal) — 33.876, -38.969

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