On
June 3, 2007 NASA's five THEMIS spacecraft discovered a breach in
Earth's magnetic field ten times larger than anything previously thought
to exist. Solar wind can flow in through the opening to "load up" the
magnetosphere for powerful geomagnetic storms. But the breach itself is
not the biggest surprise. Researchers are even more amazed at the
strange and unexpected way it forms, overturning long-held ideas of
space physics.
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