The massive security operation surrounding Barack Obama's inauguration showed that he will be the most protected president in the history of the United States. Photo: REUTERS.
The physics of a tsunami. Tsunamis can have wavelengths ranging from 10 to 500 km and wave periods of up to an hour. As a result of their long wavelengths, tsunamis act as shallow-water waves. A wave becomes a shallow-water wave when the wavelength is very large compared to the water depth. where g is the acceleration due to gravity (= 9.8 m/s2) and H is the depth of water.
The 2011 Tsunami in Japan Most scientists reported that the 33-foot tsunami wave made it 6 miles inland, with washed up shrapnel and water reaching 10 miles or more inland. There are various factors that determine how far inland a tsunami can go. Here is a list of factors involved: The terrain of the land and the height of the tsunami wave. If the land is mountainous the tsunami would probably not go very far; however, if it is lowland, it may wash inland for several kilometers.