Originally posted by CrazeeMomma4
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CrazeeMomma,
I believe I understand what your saying and thinking but tsunamis don't exactly work that way. As it comes on shore (continental shelf) it will gain speed, height and intensity. All river valleys will be inundated as the surge moves up all available avenues, which increases the speed and height of the tsunami. A 100 foot tsunami may exceed 200 to 300 feet in elevation as the water trys to lose its available energy. They also come in "sets" of waves and I know that increases the damage and reach, but I'm not sure how. Here is a map of tsunami danger that had been referenced to me for a major event.
Hope I made a little sense. I understand the basics but it was explained to me by folks that really knew there business.
Dale
FYI - July 9, 1958: Regarded as the largest recorded in modern times, the tsunami in Lituya Bay, Alaska was caused by a landslide triggered by an 8.3 magnitude earthquake. Waves reached a height of 1,720 feet (576 meters) in the bay, but because the area is relatively isolated and in a unique geologic setting the tsunami did not cause much damage elsewhere. It sank a single boat, killing two fishermen.
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