Why are tsunamis so destructive quizlet?
Why tsunamis are dangerous? Tsunamis grow in height and speed as they reach shallower water, in a wave squall process,and because they have a small wave height offshore, and a very long wavelength (often hundreds of kilometers long). section that it begins to slow and grow in height.
What makes the tsunami cause big damage?
The amount of energy and water contained in a huge tsunami can cause extreme destruction when it strikes land. … Most of the damage is caused by the huge mass of water behind the initial wave front, as the height of the sea keeps rising fast and floods powerfully into the coastal area.
What features may be common along active faults like the San Andreas?
What features may be common along active faults, like the San Andreas? Events that would lead to the formation of a tsunami due to an earthquake in order from first to last: – Megathrust is locked, causing the seafloor to bulge under stress. – Megathrust ruptures, & bulging plate changes shape.
Why does a tsunami occur quizlet?
Most tsunamis are caused by earthquakes generated in a subduction zone, an area where an oceanic plate is being forced down into the mantle by plate tectonic forces. … This sudden motion is the cause of the tsunami – because it gives an enormous shove to the overlying water.
What is a tsunami quizlet oceanography?
A tsunami is a series of water waves (“splash waves”). They can happen in lakes, frequently in Japan, many different causes. Tsunami. A series of waves with very long wavelengths (100-200 km) and periods (10-80 minutes). Their periods are much longer than storm-generated swell.
What type of destruction do tsunamis cause?
There are three factors of destructions from tsunamis: inundation, wave impact on structures, and erosion. Strong, tsunami-induced currents lead to the erosion of foundations and the collapse of bridges and seawalls. Flotation and drag forces move houses and overturn railroad cars.
What are the 4 main causes of tsunamis?
Some of the major reasons for formation of tsunamis are as follows:
- (i) Undersed earthquakes:
- (ii) Landslides:
- (iii) Volcanic Eruptions:
- (iv) Meteorites and Asteroids:
What effect can tsunamis have quizlet?
As a tsunami nears the coastline, it may rise to several feet, and can cause great loss of life and property damage when it comes ashore. Tsunamis can travel upstream in coastal estuaries and rivers, with damaging waves extending farther inland than the immediate coast.
What are effects of tsunami?
4. Types of tsunami impacts
|Impact||People and Animals|
|Water Currents||Moving waves wash out residential settlements, human beings and cattle.|
|Contamination||Contaminated water injures and causes health hazards|
|Debris/sediments of soil||Human fatalities and severe injuries|
|Gas and Fire||Leakage of gas, explosions due to leakage.|
How does a tsunami occur?
What causes tsunamis? Most tsunamis are caused by earthquakes on converging tectonic plate boundaries. … However, tsunamis can also be caused by landslides, volcanic activity, certain types of weather, and—possibly—near-earth objects (e.g., asteroids, comets) colliding with or exploding above the ocean.