http://www.drgeorgepc.com/TsunamiMegaEvaluation.html
A good article about the collapse megatsunami threat....
There are some serious problems with the modeling of the La Palma waves...and this guy isn't the only guy that has pointed this out...
But the media (And crappy cable science documentaries) consistently ignore the doubters and present a sensationalized one-sided story.
As with most 'good science' the offering of counter theories is useful and generally leads to better understanding. I read the link ... thanks for the alternate view. The Lituya Bay collapse was from an altitude and of a mass capable of transferring a huge amount of energy directly to wave propagation. It appears the La Palma mass isn't arranged so precariously, but I'll keep reading up on it.