Page last updated on: Saturday, March 16, 2013 Geomagnetic Storm Warning A magnetic eruption on the sun during the early hours of March 15th hurled a coronal mass ejection (CME) directly toward Earth. NOAA forecasters estimate a 70% chance of polar geomagnetic storms when the CME arrives on March 17th. High-latitude and possibly even middle-latitude sky watchers should be alert for auroras this weekend. Visit http://spaceweather.com for more information and updates.