please help, its for my sisters homework :)
2006-08-02 22:05:07 · 10 answers · asked by Anonymous in Education & Reference ➔ Homework Help
They don't make waves until the water gets shallower near the coastline, much like surf.
2006-08-02 22:07:12 · answer #1 · answered by michinoku2001 7 · 0⤊ 0⤋
Because the swell is not noticeable until it hits land. The ground slopes up on the beach and that is where it gets it's destructive force going. Whenever a tsunami hits, the water at the beaches it is heading for, recedes really drastically and suddenly. That is a good sign that things aren't going to be too fun in a few minutes.
2006-08-03 05:11:40 · answer #2 · answered by sherijgriggs 6 · 0⤊ 0⤋
The shock wave travels very fast, like 600 miles and hour, and is only a few inches high in deep water. when the ocean floor starts to shallow, the wave slows down and begins to pile up on itself.
2006-08-03 05:09:26 · answer #3 · answered by DL 6 · 0⤊ 0⤋
The earthquakes that cause them can be felt by seismographs in a lot of cases, but I think there are other causes that may not trip the seismographs.
The wave cannot be seen until it gets much closer to shore due to the way that waves work.
2006-08-03 05:09:18 · answer #4 · answered by ◄ Mal ► 3 · 0⤊ 0⤋
Tsunamis are actually ENERGY being transmitted through the water at very high rates of speed. They are not movements of water itself. Go to http://www.wavehelp.com/how-hurricanes-tsunamis-form.htm for more details.
Best wishes.
2006-08-03 15:58:43 · answer #5 · answered by Anonymous · 0⤊ 0⤋
when in deep water, there is nothing for the wave to collide with, so it travels quickly and almost unnoticed.
when the wave gets closer to the shore, it strikes the land under the water and is forced to rise. as the wave reaches the coast, all of the enrgy of the wave is displaced upwards.
2006-08-03 05:09:28 · answer #6 · answered by Anonymous · 0⤊ 0⤋
cos when they are out at sea, the waves are really small [like normal waves] but once they reach the coastline they begin to get bigger and stronger. Hope this helps ^^"
2006-08-03 05:08:22 · answer #7 · answered by § Moonlight Shadow § 1 · 0⤊ 0⤋
because the mass of water in the "ocean" cannot be easily traced until its near the shoreline.
2006-08-03 05:08:55 · answer #8 · answered by john s 3 · 0⤊ 0⤋
they can, actually they set up GPS in bouys, thats how they are deployed currently, they can give altitude changes which in effect sees the wave.
2006-08-03 05:08:53 · answer #9 · answered by no1special 5 · 0⤊ 0⤋
www.justfuckinggoogleit.com
2006-08-03 05:08:22 · answer #10 · answered by Anonymous · 0⤊ 0⤋