Most Powerful Solar Flare in 7 Years Blasts Earth: Expect Stunning Auroras
The Sun just unleashed the most powerful flare we've seen in seven years. On October 3, a flare measured at a strength of X9.0 exploded right in the middle of the solar disk. Even more excitingly, it was accompanied by what is known as a halo coronal mass ejection – one that is ejected straight at Earth.