The cause and effects of tsunami

Contact Author The effects of a tsunami are devastating. They are one of the world's worst natural disasters that can hit a country.

The cause and effects of tsunami

The tsunami is the movement of water of sea that is caused by sudden sea level changes in the ocean. The Greek historian, Thucydides was the first to link the tsunami to an undersea earthquake.

Research is still underway to understand the causes of tsunami. Tsunami can occur in the event of a disturbance causing large volumes of water, such as volcanic eruptions, earthquakes, landslides and meteors that fall to the earth. In the historical record of several tsunamis caused by erupting volcanoes, for example when the eruption of Mount Krakatau.

This resulted in the huge flow of sea water energy. When it reached the shore, the energy transform into a large wave that resulted in a tsunami. Sea Erosion This vertical movement can occur on earthquakes that is also common in below areas, where oceanic plates slip beneath continental plates.


Landslides that occur on the seafloor and the fall of a volcano can also lead to disruption of sea water that can produce tsunami. As a result, the seabed fluctuates suddenly so that the balance of sea water above it is disrupted.

Similarly, cosmic objects or meteors that fall from the top. If the size of the meteor or landslide is quite large, mega tsunami can occur that reach hundreds of meters high. Ocean Layers Tsunami is a series of long waves caused by sudden massive water movement.

Tsunami can be triggered by earthquake events, volcanic eruptions, and avalanches on the seabed, or landslide in large volumes, the impact of meteors, and the collapse of the coastal slopes falling into the sea or the bay.

Ocean Pollution Tectonic Earthquake Earthquake is earth shaking caused by the collision between earth fragment, active volcanic activity or rock fall. Earthquake strength due to volcanic activity and rock collapse is relatively small, so we will focus the discussion on the earthquake as a result of intercollision between earth fragment and active faulting.

What Causes a Tsunami?

Marine Energy Tectonic earthquakes are the most damaging types of earthquakes that occur because of the release of energy stress that buried inside the rocks due to internal movement. The characteristics of the earthquake that caused the tsunami is: Earthquakes centered on the sea and shallow 0 — 30 km.

An earthquake with a strength of at least 6. Marine Disasters An earthquake with a fault pattern rises or a fault decreases. Ocean Phenomena Tsunami which caused by tectonic earthquakes are affected by depth of the source of the earthquake as well as the length, depth, and direction of tectonic fracture.

The cause and effects of tsunami

In general, new tsunami may occur if the depth of the epicenter is less than 60 km across below sea level. Immediately, after the earthquake happened the tsunami will raised to all direction. When it reaches the shore, the water mass will propel up and headed to the mainland.

When high tsunami waves reaching the shore, it is greatly influenced by the contours of the seabed around the coast.

Otherwise, if the distant tsunami go to the land, it is strongly influenced by topography and the usage land in the coastal area. Lack of track facilities and evacuation sites for the citizens are also one example of a lack of ability to deal with disaster.

There is a tendency that the Disaster Risk Reduction Program DRR only considered as an additional cost, not part of a development investment that can ensure sustainable development.A tsunami or tidal wave is a series of waves in water body contact caused by the displacement of a large volume of water generally in an ocean or a large effects range from destruction and damage, deaths,injury, financial lossand long lasting psychological problems.

What Causes a Tsunami?

The typical cause is an earthquake under the ocean floor. Tsunamis can also be caused by huge landslides into bodies of water, or by the impact of a large enough meteorite into an ocean or very.

The cause and effects of tsunami

The Cause and Effect of the Tsunami in Thailand in The tsunami in Thailand that occurred on December 26, , was by far the largest tsunami catastrophe in human history.

It was triggered by a magnitude earthquake along the Indian-Australian subduction zone off the northern coast of . Sep 12,  · Tsunami flooding then continues to cause damage for several more weeks. The effects of the tsunami on the country during this period range from destruction and damage, death, injury, millions of dollars in financial loss, and long lasting psychological Reviews: Feb 28,  · Tsunami is a Japanese word which means 'harbour wave' Earthquakes under the sea are the main causes of Tsunamis The biggest tsunami ever was at Lituya Bay, Alaska on July 9, Earliest tsunamis was in Sicily 8, years ago Landslides and volcanoes can also cause tsunamis A tsunami is a powerful Reviews: What is a Tsunami?

A tsunami is a sudden violent change in the earth’s surface resulting from a destructive sea wave caused by an earthquake or volcanic eruption. The volcanic or earthquake activity usually creates a huge wave underneath the ocean, which eventually come down violently onto the .

BBC Bitesize - GCSE Geography - The causes and effects of the Asian Tsunami