Chapter 10 Section 3 Earthquake Hazards Objectives: -Summarize earthquake hazards and the damage...
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Transcript of Chapter 10 Section 3 Earthquake Hazards Objectives: -Summarize earthquake hazards and the damage...
Chapter 10 Section 3Earthquake Hazards
Objectives:-Summarize earthquake hazards and the damage they can cause-Explain how safe building practices and earthquake prediction can prevent damage
Earthquake Hazards
• Aftershocks, fires, and tsunamis may cause damage after earthquakes
Ground Shaking and Foundation Failure
• Waves set in motion by earthquakes similar to the way a bell vibrates when struck
• Largest vibrations are side to side and cause buildings to collapse
Liquefaction
• Occurs when loose soil behaves like a liquid and causes the foundations of building to collapse. – What kind of waves? Be specific.
• Liquefaction• animation of seattle harbour distruction
Aftershocks
• Smaller earthquakes after initial earthquake and further damages buildings
Tsunamis
• Underwater earthquakes and landslides sometimes cause huge ocean waves
• Tectonic Simulation• Sumatra Simulation• Sri Lanka Tsunami 2004
Seismic Gaps
-Plotting earthquake foci from past earthquakes can reveal patterns in seismic activity.
-Gaps may reveal places where stresses build.
See Page 226