The biggest solar X-ray flare ever is classified as X28


Solar flare - 4 November 2003
 
Just as solar scientists were ready to start breathing normally again after the solar activity of October 2003, active region 10486 blasted off yet another mega-flare. This one saturated the X-ray detectors on the NOAA's GOES satellites on 4 November 2003.



Release date: 7 November 2003