M 5.4 earthquake: North Atlantic Ocean (Portugal) — November 21, 1991

M 5.4 earthquake: North Atlantic Ocean (Portugal) — November 21, 1991. Epicenter 1125 km N of Angra do Heroísmo, depth 10 km, 21:03 Local (1991-11-21 23:03 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1125 km N, Portugal) — 48.749, -28.046

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