28.12. Factors Causing Variation in Observed Intensity

Try these first

1. 1.

   What effect does soft soil have on seismic shaking?

   Hint

   Think about how different types of surfaces react.

2. 2.

   How does distance from the epicenter affect the perceived intensity of an earthquake?

   Hint

   Consider how far away you are from the source of the shaking.

3. 3.

   What effect does local soil have on earthquake intensity?

   • Amplifies it
   • Dampens it
   • Has no effect

   Hint

   Think about how a sponge might absorb water compared to a surface.

4. 4.

   True or False: Shallow-focus earthquakes typically cause less shaking than deep-focus earthquakes.

   • True
   • False

   Hint

   Consider how close the earthquake is to the surface.

5. 5.

   Evaluate how changes in local building regulations could influence the resilience of urban populations in seismic zones.

   Hint

   Consider what features are necessary for buildings in high-risk areas.

6. 6.

   Discuss how varying soil types across a city can dictate where to build key infrastructure, such as hospitals and emergency services.

   Hint

   Think about how the response would differ based on proximity to soft versus hard ground.