M 4.6 earthquake: North Atlantic Ocean (Portugal) — December 6, 1999

M 4.6 earthquake: North Atlantic Ocean (Portugal) — December 6, 1999. Epicenter 1256 km SW of Horta, depth 10 km, 17:12 Local (1999-12-06 20:12 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1256 km SW, Portugal) — 32.247, -40.182

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