KnowraVan Allen radiation beltLinked fromLinked fromThe 4 pages that link to Van Allen radiation belt, each with the reason it gives.All 4Broader topic 3Related 1MagnetosphereBroader topic: They are a prominent example of particles held by a planetary magnetic field.International Geophysical YearBroader topic: Explorer 1 measurements during the program revealed these belts around Earth.Charged particleBroader topic: They are a concentrated example of charged particles confined around a planet.Medium Earth orbitRelated: Parts of MEO pass through intense trapped-particle environments that degrade satellite electronics.