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Tsunamis Indian Ocean 2004: Causes and Outcomes Japan 2011: Causes and Outcomes

Tsunamis Indian Ocean 2004: Causes and Outcomes Japan 2011: Causes and Outcomes. Lecture Outline What is a tsunami? Tsunami Formation Earlier Tsunamis Tsunami December 26, 2004 What is a disaster? Political geography of disasters around the world Outcomes of 2004 Tsunami. Tsunami:

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Tsunamis Indian Ocean 2004: Causes and Outcomes Japan 2011: Causes and Outcomes

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  1. Tsunamis Indian Ocean 2004: Causes and Outcomes Japan 2011: Causes and Outcomes

  2. Lecture Outline • What is a tsunami? • Tsunami Formation • Earlier Tsunamis • Tsunami December 26, 2004 • What is a disaster? • Political geography of disasters around the world • Outcomes of 2004 Tsunami

  3. Tsunami: Tsunami: a natural phenomenon consisting of a series of waves generated when water in a lake or the sea is rapidly displaced on a massive scale. They are often caused by underwater earthquakes, landslides or a volcanic eruption, but can also be caused by large meteorite impacts. The term tsunami comes from the Japanese language meaning harbor (tsu) and wave (nami). -Small amplitude and long wavelength... It is incorrect to call them tidal waves, as they are not related to the tides.

  4. Earthquakes • Earthquake: A sudden motion or trembling in the Earth. The motion is caused by the quick release of slowly accumulated energy in the form of seismic waves. Most earthquakes are produced along faults, tectonic plate boundaries, or along the mid-oceanic ridges. • Seismic Wave: Successive wave-type displacement of rock. • Magnitude: relative amount of energy released during an earthquake. • Richter Scale : A logarithmic measurement scale of earthquake magnitude. This scale measures the energy released by the largest seismic wave associated with the earthquake. • (On logarithmic scale, energy increase from one magnitude to the next is about 32 times greater.0

  5. Tsunami Formation • Vertical displacement of water • Caused by earthquakes, landslides, volcanic eruptions, meteorites • Tsunami Movement • This movement creates a wave in the water body which radiates outward in concentric shells. Water is seeking equilibrium. • Low amplitude and long wavelength • Fast travel across ocean • “Pile-up” as it reaches a coastline

  6. Water (and waves) “piles-up” at the coastline

  7. Damage A tsunami looks like an endlessly onrushing tide which forces its way around and through any obstacle. Most of the damage is done by the huge mass of water behind the initial wave front. The sheer weight of the water is enough to pulverise objects in its path, reducing buildings to its foundations and scouring exposed ground to bedrock. Banda Aceh, Indonesia Photo: Choo Youn-Kong

  8. From 2004 Tsunami

  9. 2004 Indian Ocean Tsunami December 26, 2004 9.2 magnitude earthquake Deadliest on record, killing 310,000 people. No organized alert system in Indian Ocean region. Affected countries of : Indonesia, northwest Malaysia, Thailand, Bangladesh, India, Sri Lanka, Maldives, Somalia, Kenya, Tanzania.

  10. Subduction of Indo-Australian plate beneath Eurasian Plate

  11. Indian-Australian Plate Movement into Eurasian Plate

  12. Sri Lanka Coastline, Before (satellite photo)

  13. Sri Lanka Coastline, waters receding, After tsunami

  14. Banda Aceh Before

  15. Banda Aceh After

  16. Thailand

  17. What is a disaster? • Where human (and political) and physical worlds collide. • Disaster: • “situation or event, which overwhelms local capacity, necessitating a request to national or international level for external assistance; an unforeseen and often sudden event that causes great damage, destruction and human suffering”. -from United Nations Photo: Marcelo Hernandez

  18. Political Geographical Dimensions of Disaster • UN categorizes disasters as follows: • Hydro-meteorological disasters: including floods and wave surges, storms, droughts and related disasters (extreme temperatures and forest/scrub fires), and landslides & avalanches; • Geophysical disasters: divided into earthquakes & tsunamis and volcanic eruptions; • Biological disasters: covering epidemics and insect infestations. • Technological disasters: • Industrial accidents: such as chemical spills; collapses of industrial infrastructures; explosions; fires, gas leaks; poisoning; radiation; • Transport accidents: by air, rail, road or water means of transport; • Miscellaneous accidents: collapses of domestic/non-industrial structures; explosions; fires.

  19. Numbers of Disasters is Rising Dramatically (UN Figures)

  20. UN Development Categorization OECD Developing EEC Less Developed

  21. Different Disasters for Differently Developed Areas of World

  22. Outcomes of Tsunami- • There are many outcomes from this disaster: ecological, psychological, demographic, cultural, humanitarian, political etc. • Here are just a few of the expected and unexpected outcomes of a disaster such as this.

  23. Aftershocks and Volcanic Activity

  24. Volcano now erupting on Sumatra, 25,000 evacuated 4/13

  25. Unexpected Outcomes of Tsunami • Release of Nuclear Wastes in Somalia

  26. Unexpected Outcomes of Tsunami • Release of Nuclear Wastes in Somalia • Less Donations for Other Disasters • The United Nations flash appeal for victims of the Indian Ocean tsunami was "an extraordinarily effective emergency relief effort," but all the world's other "neglected emergencies" are woefully under-funded even though the amount sought is only a fifth of what Europe spends on ice cream each year, a senior UN official said today.

  27. Unexpected Outcomes of Tsunami • Release of Nuclear Wastes in Somalia • Less Donations for Other Disasters • Creation of Tsunami Warning System for Indian Ocean countries, launched this summer by US AID

  28. Unexpected Outcomes of Tsunami • Release of Nuclear Wastes in Somalia • Less Donations for Other Disasters • Creation of Tsunami Warning System for Indian Ocean • More than one million indigenous persons were displaced by the earthquake and tsunami in South Asia.

  29. Unexpected Outcomes of Tsunami • Release of Nuclear Wastes in Somalia • Less Donations for Other Disasters • Creation of Tsunami Warning System for Indian Ocean countries (meeting today) • More than one million indigenous persons were displaced by the earthquake and tsunami in South Asia. • Trafficking of Children for Sex Trade • http://www.usdoj.gov/criminal/ceos/trafficking.html

  30. Unexpected Outcomes of Tsunami • Release of Nuclear Wastes in Somalia • Less Donations for Other Disasters • Creation of Tsunami Warning System for Indian Ocean countries (meeting today) • More than one million indigenous persons were displaced by the earthquake and tsunami in South Asia. • Trafficking of Children for Sex Trade • http://www.usdoj.gov/criminal/ceos/trafficking.html • No Relief?

  31. Japan’s Earthquake and Tsunami 2011 http://www.huffingtonpost.com/2012/03/11/japan-tsunami-anniversary_n_1337534.html?ref=japan-tsunami

  32. http://www.huffingtonpost.com/news/japan-tsunami Lingering Impacts: Debris and Ghost Ships Impacts on Nuclear Energy worldwide Film: http://www.pbs.org/wgbh/pages/frontline/japans-nuclear-meltdown/

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