X Marks the Spot
July 26, 2012
An X1.4 (large) flare associated with a coronal mass ejection erupted from an active region facing right towards Earth (July 12, 2012). And sure enough when the cloud of particles got here, over the period of July 14-16, millions of people got to see beautiful aurora around the world.
Topics: Coronal mass ejection, Plasma physics, Space plasmas, National Aeronautics and Space Administration, Environment, March 1989 geomagnetic storm, Aurora, Corona, Solar flare