28.12.4. Distance from Epicenter

Try these first

1. 1.

   What happens to earthquake intensity as the distance from the epicenter increases?

   Hint

   Think about how sound dissipates over distance.

2. 2.

   Name one factor that might increase earthquake shaking intensity.

   Hint

   Consider what types of ground would absorb or amplify vibrations.

3. 3.

   What is the effect of increasing distance from the epicenter on earthquake intensity?

   • It increases intensity
   • It decreases intensity
   • It has no effect

   Hint

   Consider how sound and energy behave over distance.

4. 4.

   True or False? Soft soil can amplify the effects of an earthquake.

   • True
   • False

   Hint

   Think about how different surfaces interact with earthquake waves.

5. 5.

   Analyze an earthquake with a magnitude of 7.0 occurring 10 km from a city built on soft soil and compare the predicted intensity with that of a similar earthquake occurring 70 km away from a city on hard rock.

   Hint

   Consider how different soil types and distances work together to impact observed intensity.

6. 6.

   Discuss how emergency planners should consider both distance from the epicenter and local conditions when assessing earthquake risk in urban areas.

   Hint

   Remember this combines both the physical distance and the nuances of local geology.