The name tsunami came from the Japanese words, the term “tsu” means harbor and “nami” means wave. Hence the meaning of tsunami means harbor-wave
A tsunami occurs whenever there is a disturbance deeper under the ocean. These disturbances are caused mainly by the natural disasters like earthquake, a landscape or volcano. The most common cause for tsunami is an underwater earthquake. This underwater earthquake needs to be a larger one of about 7.0 magnitude or even bigger
This type of earthquake occurs because of the continental and the oceanic plates that are the huge areas of earth’s crust that push with each other and high pressure is built. The pressure builds and builds till the oceanic plate slips under the continental plate which releases all energy and that pressure which is called as an earthquake
As the underwater earthquake is large the ocean floor will also make movements accordingly and therefore the water above the floor will also move by pushing the ocean water also upward by causing the large ripple. This large water ripple starts to travel through the ocean. This large ripple soon becomes the tsunami which travels at a very fast speed of 600 miles per hour. This is how the tsunami occurs. Japan is the country where tsunami occurs more frequently. The record shows approximately 195 events
Wednesday, August 25, 2010
Tsunami
Monday, August 2, 2010
Subscribe to:
Posts (Atom)