The Dangers of Tsunamis

At present there are not many that can be made ​​by those who are faced with a tsunami. In the Japanese archipelago, the government has built a fortress on the coast to prevent the city from the dangers a tsunami, but to one person, not a lot that can be created by They were empty except for areas that are expected to be hit by the tsunami.

The main cause of tsunami is submarine earth movement caused by submarine earthquakes. Tsunami earthquakes occur in the setting zone “subduction zones” where pieces of the earth’s crust, or “lithosphere” is known as plaque tetonik clashed with each other causing one of them goes down under the other. There are embedded zone “subduction zones” on the edge of Chile, Nicaragua, Mexico, and Indonesia that triggered Tsunamis killers in 100 years ago. In the Pacific Ocean, there are 17 tsunami records from 1992 to 1996 in charge resulted in loss of 1.700 lives. Indonesia country vulnerable to natural disasters due to its position that the plate collision tetonik 3, which Euro-Asia plate, the Indo-Australian plate and Pacific plates. Besides the three large pieces of it, Indonesia is also a meeting with a small plaque tetonik like pieces of the Philippines.

When pieces of the crust sink to the bottom, moving moving-block stuck – attached to an instant before slipping. When it gets stuck on the banks of the continent, the resulting pressure. When the area is attached to free, part of the sea may rise as springboard to bounce, when the pressure released, while other parts may be drowned. Instantly after the earthquake, the water is pushed to form a wave and a tsunami was generated.

Sunset zone “subduction zones” are located throughout the world, but is best known locations along the Pacific Ring of Fire circle. “Pacific Ring of Fire”. Pacific Rim Ring of Fire is the boundary between the two plaques tetonik. Pacific Rim Ring of Fire is located along the west coast of Central and South America, Japan and the Philippines, across New Zealand, to the Atlantic. Volcanoes also exist in the middle of the sea along the ocean ridges. Middle Atlantic ridge is an example of submarine volcanoes. When the submarine volcano erupts, it could generate a tsunami.

In the open ocean, tsunami waves to reach 500 miles per hour, how fast passenger jet. But in the open ocean, tsunami waves can not be distinguished from ordinary waves. In the ocean, the waves spread out and ducked, a distance of hundreds of miles between wave peaks are only visible a few feet high. But actually, the top end of the tsunami wave is a moving mass of water piling. In contrast to the waves caused by winds in the upper layer of water effectively, setting up a tsunami thousands of feet in the sea.Due to strong tidal movements, and the nature of water, a tsunami can travel thousands of miles and lost very little energy. For example, a tsunami caused by an earthquake off the coast of Chile in 1960 produced a tsunami that had enough power to kill 150 in Jepus after moving for 22 hours as far as 10.000 miles. The tsunami then commute across the ocean for several days.

When the tsunami waves up to run ashore, they slow down due to the shallow sea floor, and the loss rate is accompanied by an increase in wave height. The waves are hard pressed to each other as akordian and rising. Depending on the type that causes a tsunami, a tsunami could cause the sea water receded causing the fish left in the ocean. It attracts people to gather to see the situation before the tsunami struck the cause of their death.
Tsunami waves can also struck with a sudden without any warning. Tsunami waves that hit peaks not like normal waves. Those who survived the tsunami waves described as a dark wall of water. Giant tsunami waves that consist of a mass of water piling will be hit the beach and coastal areas, trees toppled like a dry twig, demolishing the brick wall, and a house fire, and destroyed buildings such as games.

Source : http://scienceray.com/earth-sciences/the-dangers-of-tsunamis/#ixzz1O5cpNaWz