According to the article, a NASA mission was launched on the 30th of August 2012 to “probe” the radiation belts that are “just a few thousand miles above our heads.”
The Van Allen belts are described as, “Donut shaped rings of electrons that encircle the Earth that were one of the first discoveries of the space age.”
The article reports:
Two spacecraft launched in 1958 carrying instruments built by James Van Allen showed the presence of two distinct rings of high-energy electrons.
Using instrumentation built at the University of Colorado Boulder, the NASA mission has revealed not two, but three distinct radiation rings. The report continues:
Just a few days after launch, CU-Boulder researcher said, the instruments on board returned a shocking result: the formation of a third radiation belt.
The instruments initially showed the expected two Van Allen belts, but after a few days the outer ring appeared to compress into an intense, tightly packed electron band and a third, less compact belt of electrons formed further out, creating a total of three rings.
The middle “storage ring” persisted as the belt furthest away from Earth began to decay away until a powerful interplanetary shockwave traveling from the sun virtually annihilated both the storage ring and the rest of the outer belt.
In the following months the Van Allen radiation zones re-formed into the originally expected two-belt structure, researchers said.
“We have no idea how often this sort of thing happens,” CU-Boulder researcher Dan Baker said. “This may occur fairly frequently but we didn’t have the tools to see it.”
The findings could yield better understanding of how and when solar storms can wreak havoc on Earth, researchers said.
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