There is also supposed to be another one again in the future if the side of a mountain [ Mount Vesuvius I think ] in Europe collapses into the ocean waters.
I think it’s a landmass in the Azores.
I think you are confusing Vesuvius with something in the Canaries or Azores. There is an unstable slope that it is feared could collapse into the ocean trigering a major tsunami. A few years back there was a CSI Miami episode based on that idea. Thirty foot high wave.
Vesuvius would only affect the Mediterrean basin, not the Atlantic Ocean.