Though the possibility of this becoming a catastrophic event if anyone needs an excuse to move this would be it. One would have to move past the line created by the last large tsunami to hit this US from something of this kind. It would be like the movie where a comet hits the Atlantic Ocean. People in Florida would all just be gone, I am sorry to say, the rest of the south and east would also be in danger.
[theatlantic.com]
This link is for the Pacific Ocean as The Island of Hawaii failed and created a tsunami, which is what people are concerned about happening in the Canary Islands.

I doubt this is a reasonable thing to worry about.
Seriously if it were that easy to do then why did terrorist bother to learn to fly aircraft into buildings, when they could have just wired up the existing fault for demolition to create the land slide and wiped out our entire East coast?
Something doesn't follow there.
I wondered this every time I heard about the danger from La Palma.

@Willow_Wisp My understanding of what happened in Mauritania years ago, the tsunami was caused by a side of the volcano moving into the ocean at once. The fault was apparently five miles long and when it failed it sent this land into the ocean. A tsunami was caused that sent a wall of water 600 feet tall into the East coast of the US, much more was affected than this. I will do more research to see if I can substantiate what I am saying. I found this, I am having some slow moments today so I hope this is pertainant.
[searchanddiscovery.com]

@dalefvictor Then Ben Laden was a profoundly stupid terrorist.

@Willow_Wisp I edited my comment to make more sense. Also, I did not realize Mauritania is a part of Africa, I thought it was an island off the coast of itself. The damage of this tsunami was to everything on the east coast of any country in the Americas.

@Willow_Wisp Two very different events and Bin Laden couldn't produce anything near the cataclysmic force of a tsunami generated by a volcano collapsing and setting off that sort of destruction. The Yellowstone area is a probable source of a super volcano eruption that would devastate North America and much of the planet the way Krakatoa did a few centuries back. Geological events happen in geological time which is much longer than what humans can easily comprehend for the most part but these events do occur and on a more regular basis than we would like to believe.
Imagine the aftermath of a 600' high wall of sea water hitting the Eastern Seaboard of the United States, that's the potential but it is unlikely.

I don't know enough to make a pronouncement, I just watch on the internet.