Patterns in Earthquake Depths Analysis

Analysis:

  1. What is the relationship between an earthquake's distance from the trench and the depth of the earthquake?
  2. How does this relationship pertain to plate tectonics? Be specific and use the correct terminology.
  3. How would plotting earthquake depths have helped geophysicists when they were first trying to understand oceanic-continental convergent plate boundaries? Remember they didn't have the cross-section drawings of boundaries we have seen.
  4. In what two ways did we use earthquakes as tools for understanding plate tectonics?
  5. Would you expect deep focus earthquakes at an oceanic-oceanic convergent plate boundary? Explain your reasoning.
  6. Would you expect deep focus earthquakes at a continental-continental convergent plate boundary? Explain your reasoning.
  7. Imagine you are geophysicist plotting earthquakes. How would you explain shallow earthquakes beneath the volcanoes of a continental-oceanic crust convergent boundary?