M 5.5 earthquake: North Atlantic Ocean (Portugal) — December 16, 1997

M 5.5 earthquake: North Atlantic Ocean (Portugal) — December 16, 1997. Epicenter 1595 km SW of Horta, depth 10 km, 08:17 Local (1997-12-16 11:17 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (1595 km SW, Portugal) — 29.985, -42.628

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