Do you want historic records or geological evidence of ones in the distant past? Do you want classic tsunamis as triggered by undersea earthquakes, or will a splash like the Lituya Bay one count? Or the even bigger splashes of asteroid impacts like Chicxulub? Lots of info can be found with a simple Google search for "largest tsunami".
News on 6: Understanding Tsunamis: How These Powerful Waves Form And Impact Coasts
KTVB: "It could have been a lot worse": The impact of tsunamis on Lake Roosevelt
"It could have been a lot worse": The impact of tsunamis on Lake Roosevelt
KREM: "It could have been a lot worse": The impact of tsunamis on Lake Roosevelt
I want travel Japan but it gets earth quakes, tsunamis, typhoons. Which months lowest probability of these natural disasters?
I think (though I'm hardly an expert) that the waves generated by a comet/asteroid impact, or even the referenced Lituya Bay event, would not be the same as a tsunami. They're more of a 'big splash' with actual displacement of massive amounts of water, while a tsunami is an energy wave that's barely perceptible in open water, and only grows on reaching the shallows.
A tsunami is a series of waves that occur right after the displacement of a large amount of water. Use this tag for questions about tsunamis, why they happen, and how they occur.
My understanding of Tsunamis is they they form as a result of the seafloor abruptly changing, causing a local vertical displacement of water at the site of above the disruption, which initiates the wave. How does this process ultimately result in the shoreline often receding prior to the Tsunami reaching the coast?