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NASA's five THEMIS spacecraft have discovered a breach in the Earth's magnetic field ten times larger than anything previously thought to exist. The opening, which is four times wider than Earth itself, allows solar wind to flow and "load up" the magnetosphere for powerful geomagnetic storms, and NASA scientists say the way it was found to form "fundamentally alters previous understanding of the solar wind - magnetosphere interaction.” Like an octopus wrapping its tentacles around a big clam, solar magnetic fields draped themselves around the magnetosphere and cracked it open within minutes.
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