21.8. Faults and Earthquake Generation

Try these first

1. 1.

   What is the Elastic Rebound Theory?

   Hint

   Think about the behavior of a stretched rubber band.

2. 2.

   What is seismic moment (M₀)?

   Hint

   This measure includes rigidity, area, and displacement.

3. 3.

   What is the key concept of the Elastic Rebound Theory?

   • Stored energy in rocks is released when they break
   • Rocks compress without any movement
   • Rocks move continuously along the fault

   Hint

   Think about the release of stored energy during an earthquake.

4. 4.

   True or False: A larger seismic moment indicates a more powerful earthquake.

   • True
   • False

   Hint

   Link this to the concept of fault size and displacement.

5. 5.

   Using recent earthquake data, calculate the seismic moment for an earthquake that had a fault displacement of 3 meters, with an area of 50 km² and a rigidity modulus of 30 GPa.

   Hint

   Make sure to convert units correctly to maintain consistency in calculations.

6. 6.

   Analyze the impact of a locked fault on surrounding infrastructure during a sudden rupture event.

   Hint

   Consider how stress accumulation over time affects buildings and infrastructure.