| The
auroral oval |
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| Most
locations can only see aurora when the solar wind is |
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| active due to
solar storms. Then the Earth’s magnetic field |
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| directs energized
particles into oval rings (see dotted line) |
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| near the
poles that thicken and spread towards the equator. |
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| Auroral oval
from |
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| above
the North Pole |
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| Side
view of the two “auroral |
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| crowns” at the
poles |
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