M 4.8 earthquake: North Atlantic Ocean (Portugal) — December 20, 1989

M 4.8 earthquake: North Atlantic Ocean (Portugal) — December 20, 1989. Epicenter 1362 km SW of Horta, depth 10 km, 12:35 Local (1989-12-20 15:35 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1362 km SW, Portugal) — 31.579, -40.993

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