M 5.1 earthquake: North Atlantic Ocean (Portugal) — April 30, 1977

M 5.1 earthquake: North Atlantic Ocean (Portugal) — April 30, 1977. Epicenter 1257 km SW of Horta, depth 33 km, 13:22 Local (1977-04-30 16:22 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1257 km SW, Portugal) — 32.426, -40.344

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