Story perspectives

South Atlantic Anomaly Expands, Heightens Satellite Radiation Risks

10/16/2025

Summary

Story summary

The European Space Agency (ESA) Swarm mission shows the South Atlantic Anomaly (SAA) expanded since 2014.
The expansion now covers nearly half the size of continental Europe.
The SAA is located over South Atlantic Ocean, increasing satellite radiation risks.
Lead author Chris Finlay notes changes toward Africa and South America, indicating complex interactions within Earth's core.
The findings underscore Earth's dynamic magnetic field, vital for navigation and space safety.

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Story summary

The European Space Agency (ESA) Swarm mission shows the South Atlantic Anomaly (SAA) expanded since 2014.
The expansion now covers nearly half the size of continental Europe.
The SAA is located over South Atlantic Ocean, increasing satellite radiation risks.
Lead author Chris Finlay notes changes toward Africa and South America, indicating complex interactions within Earth's core.
The findings underscore Earth's dynamic magnetic field, vital for navigation and space safety.