M 5.4 earthquake: North Atlantic Ocean (Portugal) — April 21, 1971

M 5.4 earthquake: North Atlantic Ocean (Portugal) — April 21, 1971. Epicenter 1258 km SW of Horta, depth 14 km, 10:32 Local (1971-04-21 13:32 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1258 km SW, Portugal) — 32.284, -40.237

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