It’s called the South Atlantic Anomaly (SAA), and NASA is keeping a close eye on it. Stretching from South America across the Atlantic to Southwest Africa, this weakened zone in Earth's magnetic ...

A fairly well-known phenomenon called South Atlantic Anomaly (SAA) refers to the unusually weak magnetic field over South America and the southern Atlantic Ocean. And scientists acknowledge that ...

A magnetic observatory is being re-established on South Georgia to provide vital data on the 'South Atlantic Anomaly' as scientists monitor a possible reversal of the earth's magnetic field.