Scientists have long observed a growing dent in the Earths magnetic field just above the southern Atlantic Ocean.
The South Atlantic Anomaly, as it has become known, can wreak havoc with satellites and spacecraft that happen to pass over it.
Now, scientists suspect it may have a connection to two mysterious blobs of dense material discovered in the Earths mantle that recent research suggests could be the partial remains of Theia, an ancient Mars-sized protoplanet believed to have smashed into the Earth around 4.5 billion years ago, as Business Insider reports.
Last month, a team of scientists led by Qian Yuan, a graduate student from Arizona State University, presented the idea that the two underground blobs, each millions of times larger than Mount Everest, could have been shards left over from the collision.
Yuan and his colleagues found seismological evidence that the blobs, formally known as large low-shear velocity provinces (LLSVPs), were quite different from the rock in the rest of the Earths mantle.
The blobs may also have a connection to the South Atlantic Anomaly, as our planets magnetic field is generated by the swirling iron in Earths outer core, wherein hotter material rises into the partially solid mantle above and is replaced by sinking, denser material, a process known as convection.
Scientists believe the strange dip in the field is caused by something huge interrupting this process under the Atlantic Ocean.
As it turns out, the relatively hot and dense qualities of the two LLSVPs could technically be significant enough to affect these convection currents, Yuan proposed.
One of these blobs also happens to be near southern Africa, not too far from the South Atlantic Anomaly.
But its not a perfect fit, problematizing the theory.
Why doesnt the same weakness occur in the magnetic field above the Pacific, where the other province is? Technical University of Denmark geophysicist Christopher Finlay told BI.
Its a compelling theory, which could shed light on the mysteries surrounding the magnetic field surrounding our planet that protects us from the Suns harmful radiation.
But until Yuans claims can be evaluated, we will have to take it for what it is: a theory.
READ MORE: Remnants of an ancient planet buried inside the Earth may be the cause of a weak spot in the magnetic field [Business Insider]
More on the anomaly: Scientists: Earths Magnetic Field Could Shift 100x Faster Than Observed
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Anomaly in Earth's Magnetic Field May Be Caused by Buried Fragment of Ancient Planet - Futurism
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