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South Atlantic Anomaly
The South Atlantic Anomaly is reported to be splitting into two zones, increasing risks for satellites in low Earth orbit. The development highlights challenges posed by variations in Earth’s magnetic field.
South Atlantic Anomaly (SAA) and Van Allen Radiation Belts:
| Dimension | Key Details |
|---|---|
| SAA Definition | Provides for a dip in Earth’s magnetic field allowing cosmic rays and charged particles to penetrate deeper into the atmosphere. |
| Nickname | Is known as the Bermuda Triangle of Space. |
| Location | Is located southeast of South America and southwest of Africa. |
| Geographical Extent | Provides for spread between latitudes 5° to 40° South and longitudes 0° to 80° West. |
| Cause | Provides for proximity of inner Van Allen radiation belt to Earth’s surface. |
| Effect | Provides for increased flux of energetic particles penetrating into Earth’s atmosphere. |
| Impact | Comprises disruptions to satellite electronics, spacecraft systems, and navigation systems of aircraft and ships. |
| Van Allen Belts Definition | Provides for zones of energetic charged particles trapped by Earth’s magnetic field. |
| Origin of Particles | Comprises particles originating mainly from the solar wind. |
| Structure | Comprises inner belt formed by cosmic ray interactions and outer belt containing high-energy solar particles. |
| Location Feature | Provides for highest intensity over the Equator and near absence above the poles. |
| Discovery | Has been discovered in 1958 by James A Van Allen. |