Definitions for "Van Allen Belts"
Zones in the earth's magnetosphere where charged particles are confined by the earth's magnetic field. There are two main belts, one centered at an altitude of roughly 1.5 times the earth' radius, and the other between 4.5 and 6.0 times the earth's radius.
At least two doughnut-shaped regions of magnetically trapped charged particles high above Earth's atmosphere.
Doughnut-shaped regions of magnetically trapped charged particles high above the Earth's atmosphere. [More Info