![Diagram showing shoaling of a tsumani.](http://static.sciencelearn.org.nz/images/images/000/000/627/full/Science_Learning_Hub_Tsunami_shoaling.jpg?1674164638)
In deep water, a tsunami moves very fast and has a long wavelength and a small amplitude. As it enters shallower water, it slows down and the wavelength decreases. This causes the wave to become much taller.
In deep water, a tsunami moves very fast and has a long wavelength and a small amplitude. As it enters shallower water, it slows down and the wavelength decreases. This causes the wave to become much taller.