Watch Out for Auroras on April 17th and 18th
18 Apr 2001
An interplanetary shock wave struck Earth's magnetosphere as night fell across the Americas on Tuesday. Sky watchers located in northern Europe, Canada, and across the northern tier of US states could spot auroras Tuesday night and Wednesday morning. The shock wave was generated by a powerful solar explosion on Easter Sunday. For more information and updates please visit SpaceWeather.com.