Thursday, 13 September 2018

Essay on Tsunami A Natural Disaster

Essay on Tsunami A Natural Disaster

Essay on Tsunami A Natural Disaster

“Tsunami" is the Japanese word meaning tidal wave. A tidal wave is a large sea; wave caused by a submarine earthquake or volcanic explosion. When the ocean floor is tilted or offset during an earthquake, a set of waves is created. These waves are similar to the concentric waves generated by an object dropped into the water. 

Usually tsunamis move entirely across an ocean to the shore. A tsunami can have wave lengths of 60 to 120 mi and may reach speeds of 800 km/h. When the wave enters shallow waters, the wave, which may have been half a meter high out at sea, grows rapidly. When the wave reaches the shore, it may be 50 ft. high or more. 

Tsunamis have incredible energy because of the great volume of water affected. They bring waves of destruction capable of killing thousands of residents along the coast. Towering walls of water have struck populated coastlines with such fury that entire towns have been destroyed. In 1896 a population of 2000 in Sanriku, Japan was wiped out. Tsunamis have resulted in waves has high as 135 feet above normal sea level. 

When tsunamis strike the shore it creates a number of waves with troughs that are lower than normal sea level. Each following wave is higher than the one before it. The period between waves is 10 to 30 minutes. This usually gives people ample time to escape to high ground after the first day of. 

Most tsunamis originate along the Ring of Fire. The Ring of Fire is an area of volcanoes and seismic activity 24000 mi long. It encircles the specific Ocean. Since the year 1819 more than 40 tsunamis have struck the Hawaiian Iceland. A Tsunami warning system has been developed in area such as Hawaii their many device dated title waves occur. 

Hawaii the highest tourist area averages one Tsunami every year with a damaging of lens every 7 years. Alaska also at highest averages are Tsunami every 1.75 years and a damaging event every 7 years. The Warning is provided by a small craft see more craft records. Seismographs help determine the location where are submarine earthquake occurred. These earthquakes usually originate in one of the deep trenches in the Pacific Ocean floor. 

One of the largest and most destructive tsunamis ever recorded traveled at least hail way around the world in 1883 after the collapse of Krakatoa, a volcano in Indonesia. Waves up to 100 ft. high caused great damage along the coast of Sumatra. 

In 1964, an Alaskan earthquake generated a tsunami with waves between 10 and 20 feet high along parts of the California, Oregon, and Washington coasts. This tsunami caused more than $84 million in damage in Alaska and 123 fatalities in Alaska, Oregon, and California, although tsunamis are rare along the Atlantic coastline, a severe earthquake on. November 18, 1929, in the Grand Banks of Newfoundland generated a tsunami that caused considerable damage and loss of lives at Placentia Bay, Newfoundland.

In 1946, a tsunami with waves of 20 to 32 feet crashed into Hilo, Hawaii, flooding the downtown area and killing 159 people. The Tsunami Warning Centers in Honolulu, Hawaii, and Palmer, Alaska, monitor disturbances that trigger tsunamis, when tsunamis are recorded, it is tracked and a tsunami warning is issued to the threatened area.

Most deaths during a tsunami are a result or ravening. Associated is include flooding, polluted water supplies, and damaged gas lines. Since 1945, more people have been killed as a result than as a direct result of an earthquake's ground shaking. 

Tsunamis are a threat to life and property to anyone living near the ocean. For example, in 1992 and 1993 over 2,000 people were killed by tsunamis occurring in Nicaragua, Indonesia and Japan. Property damage was nearly one billion dollars. 

In the 2004 tsunami that occurred in the Indian Ocean the sea receding was not reported on the African coast or any other western coasts it hit, when the tsunami approached from the east. In India, the most affected areas were Andaman and Nicobar Islands and the states of Tamil Nadu and Andhra Pradesh. Pondicherry also suffered a heavy loss. In Tamil Nadu, the maximum loss was caused in the district of Nagapattinam. Thousands of people lost their lives. The Tsunami Warning System (TWS) in the pacific, comprised of 26 participating pacific, comprised of 26 participating international Member States, monitors seismological and tidal stations throughout the Pacific Basin. 

The system evaluates potentially tsunami earthquakes and disseminates tsunami warning information. The Pacific Tsunami Warning Center (PTWC) is the operational center of the Pacific TWS. Located in Honolulu, Hawaii, PTWC provides tsunami warning information to national authorities in the Pacific Basin. 



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