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).
When energy pushes the plates horizontally, the land does not raise or lower the water above it enough to cause a tsunami, Bellini said. The height of a tsunami wave is influenced by the ground's vertical movement, so changes in the seafloor's topography can either amplify or dampen a wave as it travels along.When moving in the ocean, a tsunami wave typically travels at up to 500 or 600 miles an hour â roughly the speed of a jet, Blakeman said.hen energy pushes the plates horizontally, the land does not raise or lower the water above it enough to cause a tsunami, Bellini said. The height of a tsunami wave is influenced by the ground's vertical movement, so changes in the seafloor's topography can either amplify or dampen a wave as it travels along.