NASA is actively monitoring a strange anomaly in Earth's magnetic field: a giant region of lower magnetic intensity in the skies above the planet, stretching out between South America and southwest Africa.
NASA is currently keeping an eye on a huge and strange anomaly in Earth's magnetic field. An evolving dent in Earth's magnetic field, known as the South Atlantic Anomaly (SAA), is posing serious threats to satellites passing through the region.
Still of Earth’s radiation belt, showing the double-belt structure. Image: SAMPEX/NASA.
Most people don’t know that Earth’s magnetic field has a weak spot the size of the continental US hovering over South America and the southern Atlantic Ocean.
We’re safe from any effects on the ground, but our satellites aren’t so lucky: When they zip through this magnetic anomaly, they are bombarded with radiation more intense than anywhere else in orbit. There is reason to believe that this dent in the magnetic field, called the South Atlantic Anomaly, is only getting bigger.
This anomaly is far from the only unusual feature of Earth’s magnetic field.
Most people don’t know that Earth’s magnetic field has a weak spot the size of the continental United States hovering over South America and the southern Atlantic Ocean.
We’re safe from any effects on the ground, but our satellites aren’t so lucky: When they zip through this magnetic anomaly, they are bombarded with radiation more intense than anywhere else in orbit. There is reason to believe that this dent in the magnetic field, called the South Atlantic Anomaly, is only getting bigger.
This anomaly is far from the only unusual feature of Earth’s magnetic field.