M 4.7 earthquake: North Atlantic Ocean (Portugal) — April 6, 1974

M 4.7 earthquake: North Atlantic Ocean (Portugal) — April 6, 1974. Epicenter 1260 km N of Angra do Heroísmo, depth 33 km, 00:41 Local (1974-04-06 02:41 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1260 km N, Portugal) — 49.908, -29.005

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