Here’s a gallery of amateur photographers’ lovely aurora photographs from around North America, as far south as Des Moines, Iowa, last week. “On August 1st, the interplanetary magnetic field (IMF) near Earth suddenly turned south–a condition that renders Earth’s magnetosphere vulnerable to solar wind gusts. A G2-class geomagnetic storm began soon after. Sky watchers in Canada and parts of the United States saw colorful auroras.”