NASA Researchers Track Slowly Splitting 'Dent' in Earth’s Magnetic Field

A small but evolving dent in Earth’s magnetic field can cause big headaches for satellites.

It’s what’s inside that counts

The South Atlantic Anomaly arises from two features of Earth’s core: The tilt of its magnetic axis, and the flow of molten metals within its outer core.


A pothole in space

Although the South Atlantic Anomaly arises from processes inside Earth, it has effects that reach far beyond Earth’s surface. The region can be hazardous for low-Earth orbit satellites th...

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