bedanya partikel magnetosfer dan sabuk van allen.Jadi maksudnya partikel yang membentuk sabuk berasal dari angin matahari dan partikel lainnya oleh sinar kosmik.

The Van Allen radiation belt is a torus of energetic charged particles (plasma) around Earth, which is held in place by Earth's magnetic field. It is thought that most of the particles that form the belts come from solar wind, and other particles by cosmic rays.[1] It is named after its discoverer, James Van Allen, and is located in the inner region of the Earth's magnetosphere. It is split into two distinct belts, with energetic electrons forming the outer belt and a combination of protons and electrons forming the inner belts. In addition, the radiation belts contain lesser amounts of other nuclei, such as alpha particles. The belts pose a hazard to satellites, which must protect their sensitive components with adequate shielding if their orbit spends significant time in the radiation belts.

http://en.wikipedia.org/wiki/Van_Allen_radiation_belt