M 4.7 earthquake: North Atlantic Ocean (Portugal) — June 20, 1975

M 4.7 earthquake: North Atlantic Ocean (Portugal) — June 20, 1975. Epicenter 1340 km SW of Horta, depth 33 km, 18:20 Local (1975-06-20 21:20 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1340 km SW, Portugal) — 31.816, -40.911

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