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Radiation ring around Earth mysteriously appears, then dissipates

Two Van Allen belts temporarily became three, possibly in response to solar activity

By
5:05pm, February 28, 2013

High above Earth’s surface float two rings of energetic charged particles, and for about four weeks in September, they were joined by a third. The temporary ring may have formed in response to a solar shock wave that passed by Earth, researchers report online February 28 in Science.

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