28.12.1. Local Soil Conditions

Try these first

1. 1.

   What type of soil tends to amplify earthquake shaking?

   Hint

   Think about how stable or unstable materials behave during ground motion.

2. 2.

   True or False: Hard rocks generally result in higher shaking intensity during earthquakes.

   Hint

   Consider the properties of different soil and rock types.

3. 3.

   What happens to seismic waves when they encounter soft soils?

   • They amplify
   • They diminish
   • They remain unchanged

   Hint

   Consider how different materials react to vibrations.

4. 4.

   True or False: Distance from the epicenter always results in a uniform decrease in intensity.

   • True
   • False

   Hint

   Reflect on how geological structures might change wave propagation.

5. 5.

   A city is built on soft soils and experiences an earthquake with a magnitude of 6.0. Recommend measures to reduce potential damage to structures.

   Hint

   Consider how different construction techniques can mitigate earthquake effects.

6. 6.

   Analyze the effects of a shallow-focus earthquake versus a deep-focus event on a city built in a valley surrounded by hills and soft soils.

   Hint

   Think about how depth affects the energy release and propagation of seismic waves.