Last week, the northern half of the US saw its strongest aurora borealis since June , and it appears that the green and purple light show in the sky is back for another round. The National Oceanic and Atmospheric Administration is predicting that an aurora will hit the northern half of the US on the evenings of Nov. 11-12, and it'll once again reach down to around 21 states. If you missed it due to cloud cover last week, you'll have a second chance to see it this week.

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Per NOAA , this week's aurora will be caused by a G3 geomagnetic storm, which is on the moderate side of the scale. The best time to see it will be the evening of Tuesday, Nov. 11 and the morning of Wedne

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