M 4.5 earthquake: North Atlantic Ocean (Portugal) — March 15, 1984

M 4.5 earthquake: North Atlantic Ocean (Portugal) — March 15, 1984. Epicenter 1791 km SW of Horta, depth 10 km, 19:09 Local (1984-03-15 22:09 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1791 km SW, Portugal) — 28.489, -43.807

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