Photograph by Tommy Eliassen, My Shot
You remember these photos?
Well, Nat Geo said it wasn't just from the solar storm but because the earth's magnetic fields cracked.
Such cracks form when the sun's magnetic field lines interconnect with those of the Earth. For hours at a time, charged solar particles can spill through the openings, slam into atmospheric gas, and put on dazzling displays.
(Related: "Magnetic-Shield Cracks Found; Big Solar Storms Expected.")
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