Overnight, brilliant shades of red, green, and purple painted the sky from San Francisco Bay to farmland in Wisconsin. Here's a pilot's view over Chicago. All inspiring auroras, even stretching unusually far south.Thanks to the extreme intensity of a geomagnetic storm when the sun blasts out charged particles at several million miles an hour that bombard Earth's magnetic field. But it's not all about the beauty shots. Experts say these cosmic storms have the potential to disrupt electrical grids, satellites ...

Northern Lights Alert: Why Monday’s Fall Equinox Often Causes Aurorashttps://t.co/F23qdSwNhp https://t.co/lezHPmGVdu ...