Van Allen beltVan Al·len belt
Either of two toroidal zones containing high-energy ionized particles trapped in Earth's magnetic field and surrounding the planet, beginning at an altitude of about 800 kilometers (500 miles) and extending tens of thousands of kilometers into space.
Origin of Van Allen beltAfter James Alfred Van Allen (1914-2006), American physicist
(plural Van Allen belts)
- alternative term for Van Allen radiation belt