The Cumbre Vieja volcano on La Palma, one of the Canary Islands, has been hyped as the possible source of a "megatsunami" that would wipe out much of the Atlantic coast of North America, based on an article published in 2001. However, based on more recent studies, it appears that the current risk is extremely low and that it would take thousands of years for the volcano to become dangerously unstable. A more recent article, co-written by the authors of the 2001 article, acknowledges that the possibility of a megatsunami originating at La Palma is still being debated.
Source(s):
http://www.bbc.co.uk/science/horizon/2000/mega_tsunami.shtml
http://www.lapalma-tsunami.com/
http://www.sthjournal.org/media.htm
http://es.ucsc.edu/~ward/papers/EOSCumbreVieja.pdf

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