M 4.6 earthquake: North Atlantic Ocean (Portugal) — August 15, 2025

M 4.6 earthquake: North Atlantic Ocean (Portugal) — August 15, 2025. Epicenter 778 km SW of Horta, depth 10 km, 04:34 Local (2025-08-15 06:34 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (778 km SW, Portugal) — 35.5058, -36.5504

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