Monday, February 7, 2011

Earthquake 2-4


  • Geologists can determine earthquakes risk by locating where faults are active and where past earthquakes have occurred. 
  • In the United States, the risk is highest along the Pacific coast in California, Washington and Alaska. 
  • The eastern United Sates generally has a low risk of earthquakes because this region leis far from plate boundaries. 
  • The shaking produced by seismic waves can trigger landslides or avalanches. The shaking destroys a lot of thing from Building to bridges and then to hug cracks in the ground.
  • Liquefaction occurs when an earthquakes violent shaking suddenly turns loose, soft soil into liquid mud. 
  • Aftershocks is an earthquake that occurs after a larger earthquake in the same area. 
  • A tsunami is a the water displaced by the earthquake may form a large wave called tsunami. 
  • The tsunami spreads out from an earthquakes epicenter and spreads across the ocean
  1. They can find it out by finding the faults and where past earthquakes have occurred. 
  2. It varies because in the United Sates there are lots of earthquakes. 
  3. There is shaking, Liquefaction, aftershock and tsunami. 
  4. It makes cracks in the ground and makes the soil really moist and loose. 
  5. It would make the soil even moister and then the crack happen immediately and the destruction would be greater and there will be mud slides.
  6. If your are in a building and there is a earthquake, you should stand in the door way or under a table.

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