It hasn't happened yet but the biggest waves can probably be found in Mavericks,California and Hawaii
It's "period"
Anywhere normal waves occur.
they occur i think in the plate boundarys.
Surface waves are waves that occur between two media (plural of medium).
Secondary waves.
Longitudinal waves occur where the motion of the medium is parallel to the waves.
surface waves occur on the surface its visible to people and people can surface
Freak waves and rouge waves.
Seismic waves and tsunamis.
The strongest peristaltic waves occur in the pyloric region of the stomach, or the "pylorus"
None - except that we have a grasp of the mathematical properties of sine waves. Sine waves seldom occur in nature ... but they often come close enough to be approximated by a sine wave.