Two powerful solar flares erupted from the surface of the sun on Wednesday, disrupting radio communications on Earth's day side. If they become too entangled, the stored energy is released in the form of a solar flare. On Wednesday, two solar flares erupted from sunspot region 2673: an X9.3 flare followed by a an X2.2 flare. The last such powerful X-class flare was 9.0 on Dec. 5, 2006. The most most powerful X-class flare was an incredible X28 (which is the limit of the measuring devices) on Nov. 4, 2003.

Source: CBC News September 06, 2017 19:30 UTC