Friday, March 11, 2011

Biggest disasters - tsunami in japan

Few years ago world named this disaster as tsunami . Huge ocean waves crossing the so called coast lines and hitting the beautiful beaches and cities with its never stopping flow . So is it an earthquake or high tide ? every sharp mind of the world gave a viewpoint on this after it blew the asian continent and destroyed the beautiful beaches and killing sumptuous innocent people.And now its back , Japan is famous for its frequent earthquakes but this time it was big and the danger is still not gone . The magnitude 8.9 offshore quake was followed by at least 19 aftershocks, most of them of more than magnitude 6.0.Its the biggest japan has seen since last 142years

What is Tsunami ?



Its basically tidal waves generated due to displacement of ocean water in substantial amounts .This displacement of water is usually attributed to either earthquakes, landslides, volcanic eruptions, or more rarely by meteorites and nuclear tests.The waves formed in this way are then sustained by gravity. It is important to note that tides do not play any part in the generation of tsunamis, hence referring to tsunamis as 'tidal waves' is inaccurate. Sometimes its height is even more than 100 feet above the ground level .The speed of the wave depends upon the speed of the wind flowing above the ocean .High speed waves are nightmares for people who reside on the ocean sided lands .Tsunamis race across the sea at up to 500 miles (805 kilometers) an hour—about as fast as a jet airplane. At that pace they can cross the entire expanse of the Pacific Ocean in less than a day. And their long wavelengths mean they lose very little energy along the way.


Tsunami 2004 on boxing day Indonesia



Check this live tsunami video in japan

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