M 4.5 earthquake: North Atlantic Ocean (Portugal) — August 17, 1973

M 4.5 earthquake: North Atlantic Ocean (Portugal) — August 17, 1973. Epicenter 722 km N of Angra do Heroísmo, depth 33 km, 06:51 Local (1973-08-17 08:51 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (722 km N, Portugal) — 45.105, -28.124

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