M 4.7 earthquake: North Atlantic Ocean (Portugal) — April 17, 1975

M 4.7 earthquake: North Atlantic Ocean (Portugal) — April 17, 1975. Epicenter 768 km N of Angra do Heroísmo, depth 33 km, 00:07 Local (1975-04-17 02:07 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (768 km N, Portugal) — 45.537, -27.978

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