About tsunami causes pdf

Mar 10, 2011 a tsunami is a series of large waves generated by an abrupt movement on the ocean floor that can result from an earthquake, an underwater landslide, a volcanic eruption or very rarely a large. Remember, tsunamis are an aftereffect of an earthquake. The tsunami wave breaks down objects near the coast and destroys them, but the water behind it causes more harm when it moves farther inland, destroying buildings, equipment and making a swirling pool of rubble and causing a. Tsunami impact is normally at least three hours away for regions within a tsunami watch. But landslides, volcanic activity, near earth objects e. Tsunamis are often caused by earthquakes as was demonstrated by the earthquake and subsequent tsunami in japan in march 2011.

It was generated by an extremely large earthquake off the northwest coast of the indonesian island of sumatra. Tsunami causes free download as powerpoint presentation. The most common cause of a tsunami is an underwater earthquake, but they can also be caused by other events, such as a volcano or underwater landslide. Here we are giving you tsunami seminar and ppt with pdf report. If the trough of the tsunami wave reaches the coast first, this causes a phenomenon called drawdown, where it appears that sea level has dropped considerably. May 18, 2017 here explanation about causes and effects of tsunami. It was all about tsunami seminar and ppt with pdf report.

The impact of a large meteorite could also cause a tsunami. Remain on alert until the warning is cancelled, as tsunamis may strike repeatedly. Moreover, tsunamis are often referred to high waves of water caused by changes in the flow and surge of the ocean. These walls of water can cause widespread destruction when. Advisories are issued when the tsunami forecast is in the range of 0. This is what caused the boxing day tsunami in the indian ocean in 2004 and it is also the reason behind the 2011 japan tsunami. Thinkquest team 01724 oct 04 may 05 tsunami formation definition tsunamis are defined as extremely large ocean waves triggered by underwater earthquakes, volcanic activities or landslides. A tsunami is a sudden violent change in the earths surface resulting from a destructive sea wave caused by an earthquake or volcanic eruption. Levin encyclopedia of life support systems eolss continues to be its strict teacher. Tsunami safety tips, preparation, and survival facts and. Tsunamis may also be caused by underwater landslides or volcanic eruptions. Tsunami retain their energy, meaning they can travel across entire oceans with limited energy loss. Knowledge application use your knowledge to answer questions about the causes of a tsunami additional learning. The primary cause of tsunami related mortality was drowning and, although a number of injury types were reported following tsunamis, the ratio of dead to injured is much greater in tsunamis as compared to other natural disaster types.

Tsunamis the movie the impossible starring ewan mcgregor and naomi watts documents an event that was rare, tragic, devastating but far from impossible. The tsunami caused by this earthquake probably the most disastrous so far and killed more than 200,000 people in a region from sumatra as far as to south africa. Risk factors for tsunami related death included female sex and very young and old age. The volcanic or earthquake activity usually creates a huge wave underneath the ocean, which eventually come down violently onto the shoreline. The source of the plant is known that 90% of the tsunami is caused by tectonic earthquake activity, 9% due to volcanic activity and 1% by soil landslides that occurring in water such as in the lakes or in the ocean or landslides that came from land which is enters to the ocean. A tsunami is a catastrophic ocean wave that is usually caused by a submarine earthquake, an underwater or coastal landslide, or the eruption of a volcano. The movie is a dramatization of a real event that shocked the entire world. Causes of tsunami earthquake volcanic eruption underwater explosions meteorite impacts 4. The most common cause of a tsunami is a large earthquake below or near the ocean floor, but. Tsunamis travel across the open ocean at great speeds and build into large deadly waves in the shallow water of a shoreline. The tsunami devastated the islands and coasts of more than 10 countries in southern asia and eastern africa. As a result, with large contents of minerals water becomes unhealthier for consumption. Causes, consequences, prediction, and response boris w.

As weak or powerful as any tsunami wave is, it is the weight of water behind it that causes the physical destruction. A tsunami is a series of enormous waves created by an underwater disturbance usually associated with earthquakes occurring below or near the ocean. Large earthquakes below or near the ocean floor are the most common cause. Jun 06, 2018 the most common cause of a tsunami is fro earthquakes. Tsunamis race across the sea at up to 500 miles 805 kilometers an hourabout as fast as a jet airplane. Scribd is the worlds largest social reading and publishing site. A tsunami is a series of waves in the ocean that can cause great destruction. This video shows what causes tsunamis and the importance of evacuating any area under a tsunami alert. What causes tsunami indian ocean tsunami information center. Tsunami impactsintroductiona tsunami can be described as a series of long, powerful ocean waves produced by a disturbance at or close to the ocean. A tsunami is a series of enormous ocean waves caused by earthquakes, underwater landslides, volcanic eruptions, or asteroids. It generated a tsunami which inundated hilo on the island of hawaii with a 14metre high 46 ft surge. The force of the water crushes homes and businesses and tears apart infrastructure, such as roads and bridges, leaving behind billions of dollars in damage.

The word tsunami comprises the japanese wordstsu meaning harbour and nami meaning wave. When tsunami happens water infiltrates into the soil with high contents minerals salinizing the underground water. A tsunami is a powerful series of waves that result due to an abrupt disturbance, such as an earthquake. A tsunami can cause a tremendous amount of structural damage. However, in most cases, tsunamis are caused by powerful underwater earthquakes. The causes of tsunami all tsunamis are caused by the sudden displacement of large volumes of water. Tsunamis are known for their capacity to violently flood coastlines, causing devastating property damage, injuries and loss of life.

This sudden motion could be an earthquake, a powerful volcanic eruption, or an underwater landslide. Often a tsunami wave warns of its arrival with roaring and rumbling from the ocean, but sometimes a rising wall of water approaches silently and imperceptibly. Tsunami a tsunami can kill or injure people and damage or destroy buildings and infrastructure as waves come in and go out. Tsunamis can also result from the impact of a meteor or comet in a body of water. They may even be launched, as they frequently were in earths ancient past, by the impact of a large meteorite plunging into an ocean. For example, salinity causes mineral deficiency to the people who are relying on the effected water ondrasek et al 2011.

Dec 24, 2014 on december 26, 2004 morning walkers and fishermen residing along the eastern coast of india observed a strange phenomenon of the sea receding few hundred metres inside exposing parts of the coastal s. A tsunami occurs when a large body of water, such as an ocean or sea, experiences displacement that causes a longwavelength wave of water to reach the shore. Tsunamis travel across the open ocean at great speeds and build into large. A tsunami is a series of ocean waves with very long wavelengths typically hundreds of kilometres caused by largescale disturbances of the ocean. The deeper the water, the greater the speed of tsunami waves will be. Use tv, radio andor the internet to obtain accurate information. The word tsunami was coined from the japanese word, translating to harbor wave in english. The term tsunami originates from japanese and literally means harbor wave. Tsunamis are caused by underwater landslides, volcanic eruption, earthquakes, or on very rare occasions large meteorite strikes that then generate sudden movements on the ocean floor. A tsunami can occur in any tidal state and even at low tide can still inundate coastal areas.

Here, we will discuss about what tsunami is, its causes, characteristics of tsunami wave, signs preceding it, most common tsunami occurring areas and also the most destructive tsunamis in the world. The deadliest tsunami in recorded history occurred in the indian ocean in december 2004. Tsunami watch a tsunami watch is an early alert issued to areas which may later be impacted by a tsunami. A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet 30. This disturbance can result from earthquakes, volcanic eruptions, submarine slides, meteorites hitting the ocean, or the explosion of nuclear devices near the ocean. To understand how earthquakes cause tsunamis we must first fully understand what causes earthquakes. The earthquake was caused by the movement of the indioaustralian tectonic plate as it subducted below the eurasian plate, causing the seafloor above it to lift upwards.