Beyond Earth: Earth’s Geomagnetic Activity 

Space is a better vacuum than any we can create on Earth, but it's nonetheless bustling with activity. It overflows with energy, particles, and a complex system of magnetic field lines. This animation shows the busyness of near-Earth space, where the magnetic environment around Earth can trap electrons and charged particles. 


For more information, visit: 
http://svs.gsfc.nasa.gov/20237