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Lecture10

Table of Contents

  1. Motion Inside Earth
  2. Why study Earth's internal motion?
  3. Why study Earth's internal motion?
  4. Why study Earth's internal motion?
  5. Why study Earth's internal motion?
  6. Why study Earth's internal motion?
  7. Why study Earth's internal motion?
  8. Why study Earth's internal motion?
  9. Why study Earth's internal motion?
  10. Why study Earth's internal motion?
  11. 10.1 How does convection work?
  12. Convection
  13. 10.1 How does convection work?
  14. 10.1 How does convection work?
  15. 10.1 How does convection work?
  16. 10.1 How does convection work?
  17. 10.1 How does convection work?
  18. 10.1 How does convection work?
  19. 10.2 What does mantle convection look like?
  20. 10.2 What does mantle convection look like?
  21. 10.2 What does mantle convection look like?
  22. 10.2 What does mantle convection look like?
  23. 10.2 What does mantle convection look like?
  24. 10.2 What does mantle convection look like?
  25. 10.2 What does mantle convection look like?
  26. 10.2 What does mantle convection look like?
  27. 10.2 What does mantle convection look like?
  28. 10.3 How does outer-core convection generate the magnetic field?
  29. 10.3 How does outer-core convection generate the magnetic field?
  30. 10.3 How does outer-core convection generate the magnetic field?
  31. 10.3 How does outer-core convection generate the magnetic field?
  32. 10.3 How does outer-core convection generate the magnetic field?
  33. 10.3 How does outer-core convection generate the magnetic field?
  34. 10.3 How does outer-core convection generate the magnetic field?
  35. 10.3 How does outer-core convection generate the magnetic field?
  36. 10.4 How do we know ... Earth's core is a dynamo?
  37. 10.4 How do we know ... Earth's core is a dynamo?
  38. 10.4 How do we know ... Earth's core is a dynamo?
  39. 10.4 How do we know ... Earth's core is a dynamo?

Text and Images from Slide

Drawing of Dynamo, consists of magnets that rotate on a trubine-driven shaft.

10.3 How does outer-core convection generate the magnetic field?

Fig 10.14

When we think of a dynamo we think of electric generation such as in a hydroelectric facility. Here, moving water spins magnets relative to coils of stationary wire. The field induces current in the wire, which in turn creates a magnetic field around the wires.

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