M 4.7 earthquake: North Atlantic Ocean (Portugal) — October 18, 1977

M 4.7 earthquake: North Atlantic Ocean (Portugal) — October 18, 1977. Epicenter 451 km W of Lisbon, depth 33 km, 08:37 Local (1977-10-18 09:37 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (451 km W, Portugal) — 37.199, -13.918

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