Stereoscopic Magnetic Field Lines
This stereoscopic visualization shows a simple model of the Earth’s magnetic field. The magnetic field partially shields the Earth from harmful charged particles emanating from the sun. The field is stretched back away from Sun by solar particle and radiation pressures.
The geomagnetic field is generated (and regenerated) as the conducting fluid of the Earth’s mantle and core, driven by convection of heat from deeper in the interior, induces an electromotive force (EMF) with the existing magnetic field. This process is very similar to the way an electric generator generates a voltage. That voltage then drives an induced current in the conducting fluid, which also produces a magnetic field. This feedback mechanism helps maintain the field, continuously converting the thermal energy in the Earth into magnetic field energy.
*Special thanks to SolarGuacha for this video