It really depends on where the earthquake or event to trigger the tsunami has occurred and where it is heading as Daniel pointed out. Anywhere from 10s of minutes if near the coast of a continent and up to 24 hours.
Tsunamis can travel as far as 10 miles (16 km) inland, depending on the shape and slope of the shoreline. Hurricanes also drive the sea miles inward, putting people at risk.
The largest waves, in theory, could travel up to 16 miles inland. How long the water would remain on the land depends entirely on the altitude and lay of the land. It would of course stay longer in low-lying areas, and retreat at once from higher altitudes.
With wave speeds that can reach as much as 435 miles per hour, a tsunami can travel as far inland as 10 miles, depending on the slope and the shape of the shoreline that it is traveling across.
How long for a tsunami after an earthquake?
Tsunami waves can travel up to 800 km/hr (the speed of jets!) in deep waters and become slower at shallow depths. If you lived in Chile and an earthquake produces a tsunami just offshore, then the tsunami could reach the coast of Chile in just 15 to 30 minutes.
How do you calculate tsunami?
When Earth moves water. Traditionally, scientists have looked at the earthquake itself – using location, magnitude, and depth – to estimate the size and direction of the tsunami. References, for more information, looking back to look ahead, and a new wave of data too are a few extra items to take a look at.
And even though authorities claim that the threat to Florida is “remote”, it might surprise you to learn that there are “Tsunami Hazard Zone” signs on Florida beaches. If a highly unusual event (such as a giant meteor hitting the Atlantic Ocean) caused a giant tsunami that hit Florida, the devastation would be absolutely unimaginable.
How far inland does a Category 5 hurricane go?
Hurricanes can travel up to 100 – 200 miles inland. However, once a hurricane moves inland, it can no longer draw on heat energy from the ocean and weakens rapidly to a tropical storm (39 to 73 mph winds) or tropical depression.