M 4.5 earthquake: North Atlantic Ocean (Portugal) — April 7, 1973

M 4.5 earthquake: North Atlantic Ocean (Portugal) — April 7, 1973. Epicenter 814 km N of Angra do Heroísmo, depth 33 km, 04:35 Local (1973-04-07 06:35 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (814 km N, Portugal) — 45.967, -27.609

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