Information About Tsunami

A Japanese term derived from the characters “tsu” meaning harbor and “nami” meaning wave, now generally accepted by the international scientific community to describe a series of traveling waves in water produced by the displacement of the sea floor associated with submarine earthquakes, volcanic eruptions, or landslides.

Causes:
A tsunami can be generated when convergent or destructive plate boundaries abruptly move and vertically displace the overlying water. It is very unlikely that they can form at divergent (constructive) or conservative plate boundaries. This is because constructive or conservative boundaries do not generally disturb the vertical displacement of the water column.

Earthquake-generated tsunami:

An earthquake may generate a tsunami if the quake:

 occurs just below a body of water,
 is of moderate or high magnitude, and
 Displaces a large-enough volume of water.

Drawback:
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 traveling on the other side arrives ashore, as the tectonic plate is ‘raised’ on that side of the fault line.

Warnings and predictions:
Drawbacks can serve as a brief warning. People who observe drawback (many survivors report an accompanying sucking sound) can survive only if they immediately run for high ground or seek the upper floors of nearby buildings. A tsunami cannot be precisely predicted—even if the right magnitude of an earthquake occurs in the right location. Some zoologists hypothesize that some animal species have an ability to sense that an earthquake or a tsunami has to come. If correctly monitored, their behavior could provide advance warning of earthquakes and tsunami etc.

In the end I must say that tsunami will become the largest disaster. In my point of view it is warning by nature or God to be careful for some thing worst.