A weak spot in Earth’s magnetic field over the South Atlantic Ocean has ballooned in size since 2014, satellite data reveals.
The region, known as the South Atlantic Anomaly, has grown by an area nearly half the size of continental Europe, sprouting a lobe in the direction of Africa where the field is weakening the fastest.
And the anomaly, linked to mysterious fluctuations near Earth’s outer core, could pose a risk to satellites passing over the region, according to a study published in the November issue of the journal Physics of the Earth and Planetary Interiors.
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