M 4.6 earthquake: North Atlantic Ocean (Portugal) — March 11, 1975

M 4.6 earthquake: North Atlantic Ocean (Portugal) — March 11, 1975. Epicenter 1529 km SW of Horta, depth 33 km, 01:33 Local (1975-03-11 04:33 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1529 km SW, Portugal) — 30.199, -41.926

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