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If the first part of a tsunami to reach land is a trough (called a drawback ) rather than a wave crest, the water along the shoreline recedes dramatically, exposing normally submerged areas.
A drawback occurs because the tectonic plate on one side of the fault line sinks suddenly during the earthquake, causing the overlaying water to propagate outwards with the trough of the wave at its front. It is also for this reason that there would not be any drawback when the tsunami travelling on the other side arrives ashore, as the tectonic plate is "raised" on that side of the fault line.
Drawback begins before the waves arrival at an interval equal to half of the waves period. If the slope of the coastal seabed is moderate, drawback can exceed hundreds of meters
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoThe tsunami's speed decreases and it's height increases.
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What should someone do if a tsunami is in their area?
Get to the highest ground and move inland from the ocean/ beach.
What are the options to mitigate the effects of a tsunami on an area?
what are the options to mitigate the effects of a tsunami on an area
How does tsunami affect the life of fishing families in the coastal areas?
Because Tsunami with the potency they have when they are in the coastal area the tsunami collapsed the coastal area affecting people (fishing families).
What is a ocean-wide Tsunami?
Local and regional are two different types that are based on one person's perspective. If a tsunami is regional, that means that it is in one area. If a tsunami is local, that means that it is in MY area, or very close to where I am.
How does the depth of sea affect a tsunami?
The wave generated by a tsunami is really a large swell. Swells continue along until they meet the resistance of shallowing water. When the depth of the water can no longer handle the volume of water, the wave will rise up on top of the sand in shallower water and break. If the land form creates a gentle slope then the tsunami will appear as a very strong tidal flow. If the shore is steep then the swell will rise up and break against the beach. Most damage is not done by a large crashing wave, but by the sheer volume of water that is flowing onto the land and carrying debris along with it.
What should someone do if a tsunami is in their area?
Get to the highest ground and move inland from the ocean/ beach.
what to do when tsunami-happens?
Get away from the coastal area and onto high ground.
What do the underwater volcanoes do?
If you mean Tsunami, well the whole reason a tsunami happens is because of a earthquake , the tsunami reacts and gives out a earthquake in the sea, so the tsunami pushes the waves on land causing the area to be flouded
What are the options to mitigate the effects of a tsunami on an area?
what are the options to mitigate the effects of a tsunami on an area
What can be done before a tsunami happens?
Nothing really, just run for your life. If you live in an area where an ocean is fairly close to your city. When an Earthquake occurs, start expecting a Tsunami, and get away from it the city as fast as you could.
How does tsunami affect the life of fishing families in the coastal areas?
Because Tsunami with the potency they have when they are in the coastal area the tsunami collapsed the coastal area affecting people (fishing families).
What is a ocean-wide Tsunami?
Local and regional are two different types that are based on one person's perspective. If a tsunami is regional, that means that it is in one area. If a tsunami is local, that means that it is in MY area, or very close to where I am.
How does the depth of sea affect a tsunami?
The wave generated by a tsunami is really a large swell. Swells continue along until they meet the resistance of shallowing water. When the depth of the water can no longer handle the volume of water, the wave will rise up on top of the sand in shallower water and break. If the land form creates a gentle slope then the tsunami will appear as a very strong tidal flow. If the shore is steep then the swell will rise up and break against the beach. Most damage is not done by a large crashing wave, but by the sheer volume of water that is flowing onto the land and carrying debris along with it.
How do you avoid the tsunami in future?
You can reduce effect of tsunami but there is no way you can avoid it for certain, area which are most likely to get hit by tsunami are area near sea and ocean (large amount of water) and area which also has high earthquake zone. If you are not affected by these two factors you are very unlikely to get hit by the tsunami.
Who is usually affected by tsunami the most?
Normally the people who are by the coastal areas of the Caribbean. But that doesn't mean everybody else is safe from tsunamis. If you live near a beach and that beach is near a tectonic plate there is a chance you could be attacked by that devastating natural disaster called the tsunami.
Are islands affected by tsunamis?
yes they are if they are in the area of a tsunami
Are there more than one warning for tsunamis like there is for a tornado?
Yes. There is a tsunami watch is issued if a tsunami may impact an area. A tsunami advisory is issued if a tsunami poses a threat to areas in or along the water. A tsunami warning is issued if a tsunami is expected to cause widespread flooding.
