Tsunami wave height

A startling (and beautiful) image from NOAA's Environmental Visualization Laboratory.

The wave will decrease in height as it travels across the deep Pacific but grow taller as it nears coastal areas. In general, as the energy of the wave decreases with distance, the near shore heights will also decrease (e.g., coastal Hawaii will not expect heights of that encountered in coastal Japan).

At the link there is a companion map showing ocean depths, and an animated view I haven't been able to access, probably because of a very heavy traffic.