Earth’s magnetic shield is developing a strange weak zone that’s growing fast.

A mysterious region above the South Atlantic, where Earth’s magnetic field is weaker than anywhere else, has expanded dramatically in just a decade. Known as the South Atlantic Anomaly, it now stretches from South America toward Africa, covering an area nearly half the size of Europe.
Scientists say this anomaly is changing faster than expected — and what’s happening deep inside Earth may hold the key to understanding why.












