The term tsunami comes from the Japanese 津波, tsu mean harbour and nami mean wave. A series of water waves caused by the displacement of a large volume of a body of water is known as tsunami. Tsunami waves do not resemble normal sea waves because their wavelength is far longer.
Tsunamis cause damage by two mechanisms The smashing force of a wall of water travelling at high speed, The destructive power of a large volume of water While everyday wind waves have a wavelength of about 100 metres and a height of roughly 2 metres, a tsunami in the deep ocean has a wavelength of about 200 kilometres. Such a wave travels at well over 800 kilometres per hour (500 mph).
Step 2 While a Tsunami isStep 1 travelling is gains speedA Tsunami is coursed by in the deeper water but itVolcanos, earthquakes and is not as visible in theLand slides deep water. Step 4 Step 3 The waves crashes on the The wave slows down in beach or land. the shallow water and it visible to see and it gains height. Step 5 After the Tsunami with all the destruction
EarthquakeWater column up and down Potential energy Kinetic energy Tsunami
Get in a pool or the bath tub and put your hand a goodways down and then pull it up quickly but not out ofthe water, pull up strong but dont break the surfaceand watch the result. Not exactly a tsunami, but asimple version of the science.
# It was an undersea earthquake.# Occurred on December 26, 2004 of magnitude 9.3 with an epicentre off the west cost of Sumatra, Indonesia.#Second deadliest earthquake of all time observed up to 10 minutes
Date 26 December 2004Magnitude 9.1–9.3 Mw Depth 30 km Type Undersea IndonesiaCountries or Sri Lanka regions India Thailand Maldives 230,210 – Casualties 280,000 deaths
In an opinion piece in The Wall Street Journal, published five days after the tsunami, a journalist, Andrew Browne, argued that the human destruction of coral reefs may have played a role in exacerbating the destruction caused by the tsunami. Many countries across Asia, including Indonesia, Sri Lanka and Bangladesh, have put forth efforts to destroy the coral surrounding their beaches, and instead make way for shrimp farms and other economic choices.
Father cries as heholds the hand of hiseight-year-old sonkilled in a tsunami inCuddalore, 180 kmsouth of the Indian cityof Madras, December27, 2004
Asitha Fernando, a nine-year-old Sri Lankanboy, mourns the death ofhis mother inKoralawella, south ofColombo Sri LankaDecember 28, 2004 whowas killed when a tsunamihit the area on Sunday
oThe two main occupations affected by the tsunami werefishing and tourism.oIn Sri Lanka artisanal fishery is an important source offish for local markets. industrial fishery is the majoreconomic activity, providing direct employment to about250,000 people. . Preliminary estimates indicate that 66%of the fishing f leet and industrial infrastructure have beendestroyed by the wave surges.oBoth the earthquake and the tsunami have affectedshipping in the Malacca Straits, which separate Malaysiaand the Indonesian Island of Sumarta by changing thedepth of the seabed
the Indian Ocean earthquake hascaused an enormous environmentalimpact that will affect the region formany years to come. severe damage has been inf lictedon ecosystemsthe spread of solid and liquid waste andindustrial chemicals, water pollution andthe destruction of sewage collectors andtreatment plants threaten theenvironment Sea Salt comes on soil and it is costly torestore for agriculture , . It also causesthe death of plants and important soilmicro-organisms.
Contact friends and family immediately if possible It is important to stay calm during evacuation. Further, it is also important to remember that you should evacuate to a place of higher ground. If you are in a school, college or university do what the staff tell you to. If you are on the beach or somewhere within a tsunami zone and feel an earthquake, do not wait for a warning. Immediately move away from the low lying area to a higher one. Keep in mind that if this occurs, you may have only minutes to move to higher ground. In other words, stay calm but be quick! If there is a regional earthquake, sometimes a warning will not be posted before the tsunami hits home.
Another well known precursor to a tsunami is that the tide will often roll out extremely quickly and far. Know this. However, if this occurs you likely have very little time before the tsunami hits. So, evacuate to higher ground immediately. 6. If you are on the beach and an earthquake or some other tsunami warning sign occurs, it may be prudent to keep in mind that multi story hotels with concrete reinforcement may provide a safe haven.
1. If you are in the open ocean, do not return to port.2. If you are in port, it might be advisable to communicate with the harbor authority3. owners of small boats advised to leave their vessels and move to higher ground. Owners of bigger boats will have to decide whether they have the time and desire to move their boat to deeper water in a calm and orderly manner.