The sun has unleashed its most powerful solar flare in 7 years, following another supercharged explosion earlier in the week. Both outbursts have launched coronal mass ejections (CMEs) at Earth, which could trigger vibrant aurora displays across large parts of our planet this weekend.

The sun is in a spirited mood as it kicks out a glowing series of solar flares, including a fresh X9 that's the most intense we've seen in years. Amanda Kooser Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET.

Solar flares and coronal mass ejections are normal behavior for the Sun, particularly when it's in the peak of its activity cycle, as scientists believe is the case right now. They often occur in association with each other, erupting from sunspots on the surface of the Sun.