It varies considerably. In some cases water level fluctuations from what is technically a tsunami may be as small as a few inches and might not even be noticed by beach-goers. In some cases a tsunami may be over 100 feet high. Megatsunamis triggered by landslides and asteroid impacts may be thousands of feet high. The reason tsunamis are so destructive is more because of their wavelength. A tsunami will have a much longer wavelength than normal ocean waves and so carry a much larger volume of water. While a wind-driven wave usually washes in and out in a matter of seconds, a tsunami can continue to surge inward for several minutes. A normal ocean wave 10 feet high is of little consequence, but a 10 foot tsunami can severely inundate low-lying coastal communities.
When a wave is traveling in deep water, its bottom is at a set depth. As it comes ashore, the wave tries to stay the same wave height. since the land is denser than the water, the water is forced upward. That upward movement is the height of the tsunami.
In deep ocean water, the speed of a tsunami can exceed 500 mph but the wave height may be only a few feet. As the tsunami approaches shallow water and the sea floor rises, the speed decreases while the wave height increases significantly. This is why tsunamis can cause devastating flooding and destruction when they reach the coastline.
The usual measure of a tsunami is the height of the wave just as it reaches the beach.
Tsunami waves have a much longer wavelength in proportion to their height than ordinary waves do. They are often miles long.
As a tsunami nears the shore, its speed decreases and its height increases, causing it to build up into a towering wave. This process is called shoaling. Once the tsunami reaches shallow water near the shoreline, the wave slows down further, causing it to amplify in height and potential destructive force.
it gets higher
As a tsunami wave approaches the shore, its speed decreases due to the wave energy being compressed into a smaller space. This leads to an increase in wave height and impact force when the tsunami hits the coastline.
45 degrees
As a tsunami travels across the ocean, it is in deeper water where its energy is spread out over a larger area, causing the wave height to be lower. As the tsunami approaches shallower waters near the shoreline, the wave slows down and the energy becomes concentrated, leading to an increase in wave height.
When a wave is traveling in deep water, its bottom is at a set depth. As it comes ashore, the wave tries to stay the same wave height. since the land is denser than the water, the water is forced upward. That upward movement is the height of the tsunami.
The biggest tsunami was 85meters[statue of liberty]
In deep ocean water, the speed of a tsunami can exceed 500 mph but the wave height may be only a few feet. As the tsunami approaches shallow water and the sea floor rises, the speed decreases while the wave height increases significantly. This is why tsunamis can cause devastating flooding and destruction when they reach the coastline.
The usual measure of a tsunami is the height of the wave just as it reaches the beach.
Tsunami waves have a much longer wavelength in proportion to their height than ordinary waves do. They are often miles long.
A tsunami wave can be detected by a wave gauge and pressure monitors.
As a tsunami nears the shore, its speed decreases and its height increases, causing it to build up into a towering wave. This process is called shoaling. Once the tsunami reaches shallow water near the shoreline, the wave slows down further, causing it to amplify in height and potential destructive force.
Wave height, ocean motion chapter in science text