23.12.1. Subduction Zone Mechanics

Try these first

1. 1.

   What is a subduction zone?

   Hint

   Think about where two tectonic plates meet.

2. 2.

   Define elastic rebound.

   Hint

   Consider the behavior of a stretched rubber band.

3. 3.

   What triggers a tsunami in subduction zones?

   • Rising sea levels
   • Volcanic eruptions
   • Sudden uplift of the seafloor

   Hint

   Think about what happens when a heavy object is suddenly lifted in water.

4. 4.

   True or False: Elastic rebound only happens in oceanic plates.

   • True
   • False

   Hint

   Consider the different types of subduction zones.

5. 5.

   Consider the 2004 Indian Ocean earthquake and its tsunami. Using mathematical modeling, estimate the energy release in joules based on its moment magnitude (Mw) and compare it to smaller quakes.

   Hint

   Understand that an increase of 1 in magnitude corresponds to a jump in energy release by a factor of about 31.6.

6. 6.

   Analyze the differences in response strategies adopted by Japan after the Tōhoku Earthquake compared to Indonesia after the 2004 earthquake.

   Hint

   Consider how geography and resources influence disaster response.