M 4.9 earthquake: North Atlantic Ocean (Portugal) — May 23, 1997

M 4.9 earthquake: North Atlantic Ocean (Portugal) — May 23, 1997. Epicenter 602 km N of Angra do Heroísmo, depth 10 km, 07:40 Local (1997-05-23 09:40 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Atlantic Ocean (602 km N, Portugal) — 43.973, -28.516

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