25.12.1. Amplification Effects

Try these first

1. 1.

   What term describes the point where an earthquake begins?

   Hint

   This term refers to the underground source of the earthquake.

2. 2.

   What kind of waves are produced from shallow hypocentres?

   Hint

   These waves are known to cause more surface shaking.

3. 3.

   What is the amplification effect?

   • Decreased intensity of seismic waves
   • Increased intensity of seismic waves
   • No effect on seismic waves

   Hint

   Consider how the depth of an earthquake influences wave behavior.

4. 4.

   True or False: Deep-focus earthquakes typically cause stronger shaking at the surface.

   • True
   • False

   Hint

   Reflect on the characteristics of seismic waves and depth.

5. 5.

   You are an engineer tasked with designing a skyscraper in an area with a history of shallow earthquakes. Outline your approach to ensure its safety considering the amplification effects.

   Hint

   Remember to consider multiple factors influencing the building safety.

6. 6.

   Discuss how an earthquake with a hypocentre at 50 km would differ in shaking intensity compared to one at 600 km, considering both direct and indirect impacts.

   Hint

   Think about both the direct impacts and the larger seismic context.