of the color and even some of the structure behind the aurora borealis over the weekend. And it came as the sun is likely reaching an energy peak called solar maximum.
He said the biggest solar storms usually happen around the peak of solar maximum, but if you missed this recent big display of the aurora borealis, he said the show is probably not over just yet. He also said it’s difficult to tell how long the peak solar activity will last. In Solar Cycle 23, one of Wiltberger's NCAR colleagues, Stan Soloman, captured a structured aurora over the Boulder Flatirons. And that was October 2003 – which was the last time a solar storm of this magnitude hit Earth. That was a couple years past solar maximum in that cycle.
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