Rare severe geomagnetic storm watch issued for first time in nearly 20 years amid "unusual" solar event CBS NewsNorthern lights forecast says auroras possible above US this weekend USA TODAYSolar Flares And Northern Lights: What To Know The Weather Channel'Very rare' solar storm could bring aurora to much of northern United States WCVB BostonWorld Warned to Prepare for Today's Severe Geomagnetic Storm, First in 20 Years Gizmodo