The largest island in a lake on an island in a lake on an island is a nameless 1.6-hectare (4-acre) island at 69Â°47â²35â³N 108Â°14â²28â³W / 69.793Â°N 108.241Â°W / 69.793; -108.241, 121 kilometres (75 mi) inland from the south coast of Victoria Island, Canada.
A tsunami can travel across the open ocean at about 500-miles per hour, the speed of a jet airliner. As the wave approaches land and as the ocean shallows, the wave slows down to about 30 miles-per-hour and grows significantly in height (amplitude).
The short answer, and one that many may think to be accurate, is that it will go inland until the elevation of the land is higher than the tsunami. While that sounds logical, there are variablesâ¦ Actually, the distance a tsunami will travel inland has more to do with the energy it still has left as it hits the shore. A tsunami will speed across the ocean at hundreds of miles an hour but at a relatively small height (because the ocean is DEEP).