Other nuclei, such as alpha particles, are less prevalent.The belts trap energetic electronsand protons. The belts are in the inner region of Earth's magnetic field.By trapping the solar wind, the magnetic field deflects those energetic particles and protects the atmospherefrom destruction.Most of the particles that form the belts are thought to come from solar wind and other particles by cosmic rays.Earth's two main belts extend from an altitudeof about 640 to 58,000 km above the surface, in which region radiation levels vary.The belts are named after James Van Allen, who is credited with their discovery. Earthhas two such belts, and sometimes others may be temporarily created.A Van Allen radiation beltis a zone of energetic charged particles, most of which originate from the solar wind, that are captured by and held around a planet by that planet's magnetosphere.However, the field itself varies in intensity as a gradient. The area of the SAA is confined by the intensity of Earth's magnetic field at less than 32,000 nanotesla at sea level, which corresponds to the dipolar magnetic field at ionospheric altitudes.In turn, this anomaly also causes technical disturbances in satellites and spacecraft orbiting Earth.This anomaly exists because the Earth's inner Van Allen radiation beltcomes closest to the planet’s surface, causing an increased flux of energetic particles.The South Atlantic Anomalyis a weak spot in Earth's magnetic field, which protects the planet from high doses of solar wind and cosmic radiation. This vast, developing phenomenon, called the South Atlantic Anomaly, has intrigued and concerned scientists for years.NASA is actively monitoring a strange anomaly in Earth's magnetic field: a giant region of lower magnetic intensity in the skies above the planet, stretching out between South America and southwest Africa.The inner belt results from interactions of cosmic rays with Earth’s atmosphere.The outer belt is made up of billions of high-energy particles that originate from the Sun and become trapped in Earth’s magnetic field, an area known as the magnetosphere.It surrounds Earth, containing a nearly impenetrable barrier that prevents the fastest, most energetic electrons from reaching Earth.The particles are captured by and held around a planet by that planet’s magnetic field.The Van Allen radiation belt is a zone of energetic charged particles, most of which originate from the solar wind.This leads to the penetration of solar energetic particles deep into Earth’s atmosphere, posing severe problems for airplanes and ships' positioning systems as well as spacecraft electronic systems.SAA exists because the Earth's inner Van Allen radiation belt comes closest to the planet’s surface, causing an increased flux of energetic particles.Earth’s magnetic field acts like a protective shield around the planet, repelling and trapping charged particles from the Sun.It stretches out between South America and southwest Africa.It is a region at the Earth’s surface where the intensity of the magnetic field is particularly low.
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