[Prophet in the wilderness]

From what information I have seen, and TV programs I have watched, tsunami tidal waves mostly average in hight 20 or 30 feet ? and cause massive flooding and damage over a wide are , is that correct ?
How about typhoon tidal waves ? The hurricane IVAN created waves as high as 50 feet in the GULF of MEXICO. What is the historic ( recorded ) highest tidal wave ever recorded by a tsunami or hurricane ? or a mountain/volcano avalanche ? How about a mountain avalanches ? or volcano avalanche ? I was watching a TV program ( history channel ) that a mountain avalanche in Alaska created a tidal wave over 100 feet. but, the wave was more localized in that area.

[JohnBovenmyer]

I was watching a TV program ( history channel ) that a mountain avalanche in Alaska created a tidal wave over 100 feet. but, the wave was more localized in that area.

If you were watching the program I'm thinking of they found evidence of a splash line within one narrow Alaskan inlet 1400 feet high. Now that's one monster wave. On the high seas tidal waves are fast, but quite short, gaining height in shallows. They used to be thought mythic, but they have recently shown that waves over 100 feet high can occur on the high seas, likely through some other mechanism than tsunamis.