Why Does The Earth's Core Spin

  1. Jan 29, 2008 #1
    1 Why does the Earth's core spin in relation to the crust?
    2. How quickly are viscous effects slowing it down, if it actually is slowing down?

    -deCraig
     
  2. jcsd
  3. Jan 30, 2008 #2
    The question whether or not the inner core spins faster than the mantle crust is debated for over a decade. The Last publication suggest that there is a very small super rotation factor around 0,1 sec per decade or 8.6 million years for a revolution, compared to the first estimates of one rotation every 400 years.

    Why? Any explanation is speculation although Gary Glatzmaiers geo magnetism model predicted a superrotation. So he is happy. And if that's correct then obviously the spinning of the inner core would likely react on magneto dynamic variation.
     
  4. Jan 30, 2008 #3
    Way cool, Andre. Thanks for the info.

    I'm been suffering under the impression since gradeschool that the core rotated at a significant rate--far more than quoted in your references.

    I was interested in this topic as to the origine of the Earth's magnetohydrodynamics sources, so it was nice to see it address in your links.

    -deCraig
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Similar Discussions: Why Does The Earth's Core Spin
  1. The core of the earth (Replies: 24)

Loading...