The sun did something pretty today. But don't worry it's definitely NOT a solar flare or that nasty Carrington Event we've been on the lookout for.
First, there is very little danger to Earth from this event. Prominences like this tend to be local to the Sun, and collapse after a few hours. As far as I can tell, there are no flares or coronal mass ejections associated with this, which are what can hurt satellites and power grids here at home. So rest easy, and enjoy the beauty of this thing.