magnetic field

Geography 101

‘Snapshot’ of the main magnetic field at Earth’s surface as of June 2014 based on Swarm data. The measurements are dominated by the magnetic contribution from Earth’s core (about 95%) while the contributions from other sources (the mantle, crust, oceans, ionosphere and magnetosphere) make up the rest. Red represents areas where the magnetic field is stronger, while blues show areas where it is weaker. Source: ESA/DTU Space

How the Earth’s Magnetic Field is Changing

The ESA recently released the results of data collection from Swarm from the past six months that analyzed changes in the Earth’s magnetic field.