M 4.8 earthquake: North Atlantic Ocean (Portugal) — September 20, 1999

M 4.8 earthquake: North Atlantic Ocean (Portugal) — September 20, 1999. Epicenter 1321 km SW of Horta, depth 10 km, 07:18 Local (1999-09-20 10:18 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1321 km SW, Portugal) — 31.839, -40.68

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