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https://www.economist.com/news/world-if/21724908-huge-potential-impact-rich-countries-prolonged-loss-electricity-disaster

The World IfJul 13th 2017twitter iconfacebook iconlinkedin iconmail iconprint iconON MARCH 13th 1989 a surge of energy from the sun, from a coronal mass ejection, had a startling impact on Canada. Within 92 seconds, the resulting geomagnetic storm took down Quebecs electricity grid for nine hours. It could have been worse. On July 23rd 2012 particles from a much larger solar ejection blew across the orbital path of Earth, missing it by days. Had it hit America, the resulting geomagnetic storm would have destroyed perhaps a quarter of