South Atlantic Anomaly

 EARTH'S MAGNETIC FIELD 

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WHAT IS SAA? 

The South Atlantic Anomaly (SAA) is an evolving weak spot of Earth's Magnetic Field. This unique region has been expanding for over a decade. NASA concludes that it is splitting into two distinct zones. 

HOW DID EARTH GET A MAGNETIC FIELD? 

To understand the consequence of splitting, we have to know about magnetic fields. Processes of Earth's iron outer core generates the electric field continuously. This makes the most part of the magnetic field. 

The magnetic field acts like a shield preventing harmful particles from the sun. The particles are trapped by the magnetic field and thus, prevents it from reaching the surface.

The mantle and core magnetic variations below the SAA are the causes. Due to the reduction of magnetic fields, some disruptive particles may close the surface of the Earth. 

CONSEQUENCE 

SAA can affect low orbit satellites. This can affect navigation through GPS. There will only be small changes in the nature around us. So, let's not worry about an apocalypse. NASA is tracking the evolution of SAA and prepares for any future challenges to manage satellites.

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