Tsunamis
Tsunamis (also known as seismic sea waves) are created by earthquakes, volcanoes, and other oceanic disturbances. Discover more about these amazing yet disastrous waves.

Birth of a Wave
A detailed overview of the birth of a wave; includes helpful graphics and a short glossary of wave terminology such as crest, trough, period, frequency, amplitude, wavelength, and others.

ONR: Waves
Two great graphics and a short description define the essential components and function of a ocean wave from the U.S. Navy's Office of Naval Research.

What Causes Ocean Surface Waves?
A great answer from the NOAA National Data Buoy Center.

Yahoo Picture Gallery: Waves
An amazing collection of over 1000 photographs of ocean waves from the Yahoo Picture Gallery.