M 4.7 earthquake: North Atlantic Ocean (Portugal) — January 21, 1984

M 4.7 earthquake: North Atlantic Ocean (Portugal) — January 21, 1984. Epicenter 693 km N of Angra do Heroísmo, depth 10 km, 04:30 Local (1984-01-21 06:30 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (693 km N, Portugal) — 44.839, -28.21

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