Earth’s magnetic field is continuously changing. Magnetic north wanders, and every few hundred thousand years the polarity gradually flips, so that a compass would point south instead of north.
This is the second of three videos:
Magnetic field: an introduction: http://www.youtube.com/watch?v=P7nhgX0ppek
/>Magnetic field: why it matters
Magnetic field: learning more with Swarm http://youtu.be/Wn-BV9Zp8Pk
Lithospheric magnetic field
ESA Euronews: Measuring earth’s vital magnetic field
Swarm: Understanding our life saver
Swarm reveals magnetic waves across Earth’s outer core
We are sorry that this post was not useful for you!
Let us improve this post!
Tell us how we can improve this post?