M 4.8 earthquake: North Atlantic Ocean (Portugal) — March 28, 1977

M 4.8 earthquake: North Atlantic Ocean (Portugal) — March 28, 1977. Epicenter 839 km SW of Horta, depth 33 km, 11:00 Local (1977-03-28 13:00 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (839 km SW, Portugal) — 34.627, -36.689

EarthquakeLive.org