M 4.5 earthquake: North Atlantic Ocean (Portugal) — December 5, 1980

M 4.5 earthquake: North Atlantic Ocean (Portugal) — December 5, 1980. Epicenter 343 km N of Horta, depth 10 km, 23:43 Local (1980-12-06 01:43 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (343 km N, Portugal) — 41.57, -29.349

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