No need to explain me what SPH is, I am perfectly aware of it. And in the future, please avoid assuming what others would have said or what they worry about.
I look forward to see US2 as a simulation software where one can set the initial parameters, start the simulation and watch what would happen (more or less realistically) like you do it with the climate now.
Every tsunami-lover mentions From Dust. I would rather prefer the volcanoes from there but with a "special touch" of US2 that will make them throw ash clouds, alter the atmospheric composition and opacity which will lead to climatic changes that will eventually affect the possible life on the planet.
Did you try to make a tsunami in Algodoo?? Sure, it is not as graphically pleasing as From Dust but it is waaay more educational and fun. You can see how the bathimetry of the shore is affecting the height of the wave, what kind of structures will be more prone to destruction, etc., etc...