M 5.7 earthquake: North Atlantic Ocean (Portugal) — August 6, 1975

M 5.7 earthquake: North Atlantic Ocean (Portugal) — August 6, 1975. Epicenter 1090 km SW of Horta, depth 33 km, 15:01 Local (1975-08-06 18:01 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1090 km SW, Portugal) — 33.77, -39.269

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