M 4.6 earthquake: North Atlantic Ocean (Portugal) — May 23, 1974

M 4.6 earthquake: North Atlantic Ocean (Portugal) — May 23, 1974. Epicenter 1922 km SW of Horta, depth 33 km, 06:22 Local (1974-05-23 09:22 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1922 km SW, Portugal) — 27.305, -44.369

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