SUNSPOT AR2470: Around the world, amateur astronomers are reporting tall plumes of gas rising over the suns northwestern limb.
The source of the activity appears to be old sunspot AR2740. Here is the view from NASA'S Solar Dynamic Obsevatory.
The prominence rises almost 50,00km above the edge of the sun. That means it is 4 times as tall as Earth. These dimensions make it an easy target for backyard solar telescopes. Astronomers are encouraged to monitor the area for developments. While sunspot AR2740 is about to disappear, an even bigger sunspot AR2741 is approaching the same spot for an even mor dramatic display.