Inggris tsunami

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Inggris tsunami

  1. 1. Members group 1. Ilmar cipta 2. Intan putri 3. Fridia nur sofiarani 4. Zahra ainul shahifah
  2. 2. Have you ever wondered why tsunamis happen? In this presentation we’ll give you the facts about these huge waves, so you can better understand what causes a tsunami. The name tsunami, pronounced soo-nahm-ee comes from two Japanese words; tsu means harbor and nami meaning wave, so tsunami means harbor-wave.
  3. 3. Earthquake Volcanic Eruption Underwater Landslide Meteor Impact
  4. 4. Keywords • Fault • Collapse • Pyroclastic • landslides • Impact
  5. 5. Earthquake most tsunamis are caused by submarine earthquakes but not all submarine earthquakes cause tsunamis. Movement on the fault must have a vertical component that generates sufficient displacement to set a tsunami running
  6. 6. Volcanic Eruption a volcanic eruption or explosion- submarine explosions, caldera collapse and massive pyroclastic flows can all cause sufficient displacement of water to generate a tsunami.
  7. 7. Landslide underwater landslides or coastal landslides that fall into the ocean can displace enough water to create a tsunami. Sometimes the landslides are caused by earthquakes.
  8. 8. Meteor Impact large meteorites have a high probability of landing in the ocean and causing a tsunami given that about two thirds of the surface of the Earth is covered by water.
  9. 9. A tsunami is caused when there is a disturbance deep under the ocean such as an earthquake, volcano or a landslide. An underwater earthquake is the most common cause for a tsunami, but not just any underwater earthquake causes a tsunami. The earthquake needs to be a large enough earthquake of around 7.0 magnitude or bigger. Underwater earthquakes happen because oceanic and continental plates, which are huge areas of the earth’s crust, push into each other and build up pressure. The pressure builds and builds until eventually the oceanic plate slips under the continental plate releasing all that pressure and energy in the form of an earthquake. If an underwater earthquake is large enough, the ocean floor will make significant movements, therefore the water above the sea floor must move too.

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