Where you may see northern lights this weekend, as a geomagnetic storm heads to Earth The Washington PostBiggest solar flare since 2017 erupts from sun and Earth is in the firing line (video) Space.comLook to the sky: Rare chance to see Northern Lights in Philadelphia region Friday NBC PhiladelphiaNorthern lights forecast for northern US, Midwest this week as solar flares increase USA TODAYNorthern lights could return to Colorado skies tonight, Friday The Denver Post