On April 24-25 2013, two coronal mass ejections (CMEs) erupted from the sun. Moving at about 500 miles per second these solar phenomena, capable of ejecting billions of tons of matter into space, are headed in the direction of Mercury. These kinds of events can effect satellites and while these two are not headed towards Earth they may effect the STEREO-A satellites.
For more detailed current Space Weather visit KnowledgeOrb Space Weather at http://www.knowledgeorb.com/current-space-weather/
Aurora viewing updates can be seen on the KnowledgeOrb Aurora viewing page. http://www.knowledgeorb.com/current-aurora-borealis-activity-viewing/