The Intricacies of Earth's Magnetic Field and Heat Flow.

Geophysicists at the University of Leeds have found that the way the Earth's super-hot core is cooled is key to understanding the anomalies of the Earth's magnetic field. Variations in the cooling process cause localized changes to the properties of the magnetic field, resulting in weaker magnetic fields that can interfere with orbiting satellites. The anomalies are likely caused by differences in the rate at which heat flows from the Earth's core into the mantle, and where these differences happen in the Earth's inner structure is likely to dictate how long they could last.