Enormous Ring is Developing on the Sun

"CME is short for coronal mass ejection, a plasma made up of mostly electrons and protons.

Basically, a CME is electromagnetic radiation that is ejected from active regions of the sun.

CMEs directed at Earth can interfere with  radio communications, harm satellites, and even damage electrical power transmission circuits and infrastructure, potentially causing widespread power grid failure. The biggest threat to human civilization is the later, a massive power grid failure, which could take months or even years to repair. This circumstance would require an extremely powerful CME, which fortunately do not occur on a regular basis."