M 4.6 earthquake: North Atlantic Ocean (Portugal) — April 30, 1977

M 4.6 earthquake: North Atlantic Ocean (Portugal) — April 30, 1977. Epicenter 1271 km SW of Horta, depth 33 km, 22:50 Local (1977-05-01 01:50 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1271 km SW, Portugal) — 32.254, -40.385

EarthquakeLive.org