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Earth is Facing an Impending Magnetic Field Flip

RATE THIS! +28
Posted in Science on 25th Sep, 2014 06:23 PM by AlexMuller

Earth's magnetic north and south poles have flip-flopped many times in our planet's historymost recently, around 780,000 years ago. Geophysicists who study the magnetic field have long thought that the poles may be getting ready to switch again, and based on new data, it might happen earlier than anyone anticipated.

 
The European Space Agency's satellite array dubbed “Swarm” revealed that Earth's magnetic field is weakening 10 times faster than previously thought, decreasing in strength about 5 percent a decade rather than 5 percent a century. A weakening magnetic field may indicate an impending reversal, which scientists predict could begin in less than 2,000 years. Magnetic north itself appears to be moving toward Siberia.
 
Geophysicists do not yet fully understand the process of geomagnetic reversals, but they agree that our planet's field is like a dipole magnet. Earth's center consists of an inner core of solid iron and an outer core of liquid iron, a strong electrical conductor. The liquid iron in the outer core is buoyant, and as it heats near the inner core, it rises, cools off and then sinks. Earth's rotation twists this moving iron liquid and generates a self-perpetuating magnetic field with north and south poles.

Tags: Earthmagnetic fieldspaceESA

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Comments

Author: Guest
Posted: 2014-09-26
+1
Interesting phenomenon this geomagnetic reversal. Impact on earth in 2000 years is difficult to discuss now as one hope that humans would be much more capable to deal with this Reply
Author: Guest
Posted: 2016-07-22
+0
The abtiily to think like that shows you're an expert Reply


 

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