Tsunami

What is a tsunami?

• A tsunami is a series of waves created when water is moved very quickly. Underwater earthquakes are the most common causes of tsunamis, but underwater volcanic activity can also trigger a displacement in the water, and create a mega-wave.

Tsunami "Wave Train"Many people have the mistaken belief that tsunamis are single waves. They are not. Instead tsunamis are "wave trains" consisting of multiple waves. Time is plotted along the horizontal axis and water level is plotted on the vertical axis. Note the normal rise and fall of the ocean surface, caused by tides, during the early part of this record.

Volcanic eruptionsIcefallsHeavy rainfallUnderwater earthquake

.Tsunami is one of the earth’s disaster. It was a Japanese word

meaning “harbor wave,” used as the scientific term for a class

of abnormal sea wave.

.Tsunamis can be generated by an undersea earthquake,

an undersea landslide, the eruption of an undersea volcano,

or by the force of an asteroid crashing into the ocean.

View of a Tsunami Taken By A Satellite

GENERATION OF TSUNAMIS

A Tsunami is generated when a large amount of water is displaced which is done-:

Mainly By The Earthquakes. By The Landslides. By Volcanic Eruptions. By Impact Events like Meteorite

impacts

Earthquakes – The Major Cause

The Sea floor abruptly deforms and displaces the sea water lying above.

Large vertical movements of earth's crust can occur at plate boundaries which are called “faults”.

Tsunamis may reach a maximum vertical height onshore above sea level, often called a run up height, of 10, 20, and even 30 meters.

For a typical ocean Depth of 4000m, a tsunami moves with a speed about 700km/hr.

The fast-moving water associated with the inundating tsunami can crush homes and other coastal structures.

Why It’s Destructive?

The Destruction Of Tsunami

Around 10,000 killed in India.

In Thailand, more than 4,000 are feared dead and dozens of deaths are reported in Malaysia, Myanmar and Maldives.

WHO estimates five million people are without basic needs.

RELIEF WORKS IN INDIA

Donations done under the Prime Minister Relief Fund.

Rice, mats, medicines were provided.

ITC distributed over 1 lakh shirts to the victims.

New houses were provided.

Loss of life and property can be reduced by proper planning.

Tsunami warnings can be made to aware peoples.

Stay away from all low lying coastal areas.

Never go down to the shore to watch tsunami.

Stay out of low lying danger areas until an “all-clear” is issued by competent authority.

THANK YOU