Van Allen Belts and ELFIN (illustration) (IMAGE) NASA/Goddard Space Flight Center Caption An artist's depiction of the Van Allen Belts, showing Earth's magnetic field lines and the trajectories of charged particles trapped by them. The twin ELFIN spacecraft are shown following their inclined polar orbit, traced in yellow. Credit UCLA EPSS/NASA SVS Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.