Yes, I should have made my last post more clear.
I am referring to seismic events that could wipe out the entire east coast, or entire states.
The wave seems to amplify with distance traveled, and according to the program that I watched, they traverse an entire ocean, growing larger with distance.
Their main concern was seismic areas off the coast of Africa.
I watched the videos of the Kobe Tsunami, and yes, that quake
was not so far offshore.