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Earthquakes PowerPoint Presentation

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picworld By : picworld

On : Feb 20, 2018

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In : Social Issues

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Presentation Transcript

  • Slide 1 - EARTHQUAKES
  • Slide 2 - EARTHQUAKES What to explore this week: Predictablity Linkages Disastrous consequences Impact of human activity Minimizing the impact
  • Slide 3 - Earthquake Terminology
  • Slide 4 - What causes earthquakes? Elastic Rebound Sources of stress Plate Tectonics Other stresses
  • Slide 5 - Measurement Magnitude one per earthquake related to energy released Richter or Moment scale Intensity many for each earthquake measure of effects Mercalli scale
  • Slide 6 - Damage: Causes Ground motion Duration of Shaking Surface Rupture Poor building design
  • Slide 7 - Effects Rupture Death Bldg collapse
  • Slide 8 - Effects Fires Liquifaction Landslides
  • Slide 9 - Damage: Key Factors Amount & duration of shaking Water content of soil Population concentration Building construction Distance from Epicenter Depth of focus Direction of rupture Material amplification
  • Slide 10 - Addressing the Hazard Identify areas at risk Forecast
  • Slide 11 - Addressing the Hazard Structural adaptations Warning systems
  • Slide 12 - EARTHQUAKES In what ways are earthquakes predictable? To what other hazards are earthquakes linked? What are the potentially disastrous consequences of earthquakes? In what ways has human activity made earthquake hazards catastrophic? How can the hazardous consequences of earthquakes be minimized?

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