A solar storm hit Earth on Thursday ... Excited nitrogen atoms shine in pink or purple below 120 miles. As the storming ...
High above Earth's poles, intense electrical currents called electrojets flow through the upper atmosphere when auroras glow in the sky. These auroral electrojets push about a million amps of ...
Such forewarning makes it possible to prepare electrical systems on Earth and in space for disturbances. Scientists use satellites to gauge an aurora's power, but it was the 1989 aurora's extreme ...
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