A solar flare on July 23 was even bigger than a previous one that triggered May's global aurora storm, but this one was facing away from Earth on the far side of the sun.

Sun blasts out most powerful flare of current solar cycle, sends massive coronal mass ejection into space (video)

Source: space
Source Link: https://www.space.com/sun-solar-flare-far-side-x14-july-23