M 5.3 earthquake: North Atlantic Ocean (Portugal) — May 4, 1987

M 5.3 earthquake: North Atlantic Ocean (Portugal) — May 4, 1987. Epicenter 923 km N of Angra do Heroísmo, depth 10 km, 21:17 Local (1987-05-04 23:17 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (923 km N, Portugal) — 46.953, -27.41

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