Marching Spots A video clip shows an interesting alignment of three good-sized sunspot groups that present the potential for producing solar storms are rotating to the center of the Sun where any eruptions from them could affect us here at Earth (July 28-29, 2011). The lead group has the kind of magnetic field that could produce a large (X-class) flare. The images were taken by SDO��s HMI Intensitygram that shows the Sun as it would be seen in filtered white light. This is likely the best parade of sunspot groups we have seen with SDO. And take note of this: each of these sunspots is larger than Earth. Let��s see if any fireworks ensue.