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On 11 March 2011, a Mw ~ 9.0 megathrust earthquake occurred offthe coast of Tohoku, triggering a catastrophic tsunami reaching heights of 10m and more in some places and resulting in lots of casualties anddestructions. It is one of a handful of catastrophic tsunamis having occurredduring the last decade, following the 2004 Indonesian tsunami, and leading tothe preparation of tsunami warning systems and evacuation plans all aroundthe world. In the Atlantic Ocean, which has been struck by two certifiedtransoceanic tsunamis over the past centuries (the 1755 "Lisbon" and 1929Grand Banks events), a warning system is also under discussion, especiallyfor what concerns potential tsunamigenic sources off Iberian Peninsula. Inaddition, the Lesser Antilles subduction zone is also potentially able togenerate powerful megathrust ruptures as the 8 February 1843Mw ~ 8.0/8.5 earthquake, that could trigger devastatingtsunamis propagating across the Northern Atlantic Ocean. The question is inwhich conditions these tsunamis could be able to reach the Oceanic Islands aswell as the eastern shores of the Atlantic Ocean, and what could be theestimated times to react and wave heights to expect? This paper attempts toanswer those questions through the use of numerical modelings and recentresearch results about the Lesser Antilles ability to produce megathrustearthquakes

Impact of a tsunami generated at the Lesser Antilles subduction zone on the Northern Atlantic Ocean coastlines