M 4.6 earthquake: North Atlantic Ocean (Portugal) — October 16, 2023

M 4.6 earthquake: North Atlantic Ocean (Portugal) — October 16, 2023. Epicenter 566 km N of Horta, depth 10 km, 02:00 Local (2023-10-16 04:00 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (566 km N, Portugal) — 43.6188, -28.9684

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