M 4.5 earthquake: North Atlantic Ocean (Portugal) — April 7, 1975

M 4.5 earthquake: North Atlantic Ocean (Portugal) — April 7, 1975. Epicenter 415 km N of Horta, depth 33 km, 21:25 Local (1975-04-07 23:25 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (415 km N, Portugal) — 42.213, -29.497

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