Eddies in the deep Earth
Blips in the Earth's magnetic field are windows to the planet's interior
By Sid Perkins, 15:00 PM May 18, 2008
The flow of molten material in our planet’s outer core is the prime source of Earth’s magnetic field. That flow can fluctuate rapidly over large areas, recent data suggest, so geophysical models that estimate how the magnetic field evolves over time should account for such variations.
Earth’s outer core, a molten mix of iron and other metals that is no more viscous than water, flows at an average speed of about 20 kilometers per year. Because that material contains charged partic...
Source URL: https://www.sciencenews.org/article/eddies-deep-earth