South Atlantic Anomaly
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The South Atlantic Anomaly is an area where Earth's inner Van Allen radiation belt comes closest to Earth's surface, dipping down to an altitude of 200 kilometres. This leads to an increased flux of e
Magnetic field intensity at Earth's surface in 2014 (top) and 2025 (bottom), as measured by ESA's SWARM spacecraft. The SAA has strengthened and expanded since 2014.
Earth's magnetic field
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Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from Earth's interior out into space, where it interacts with the solar wind, a stream of charged partic
South Atlantic Anomaly
…levels of ionizing radiation. The effect is caused by the non-concentricity of Earth with its magnetic dipole. The SAA is the near-Earth region where Earth's magnetic field is weakest relative to an idealized Earth-centered dipole field. The area of the SAA is confined by the intensity of Earth's magnetic field at less…
Intensity
Inclination
Declination