This worldwide astrophysical phenomena is going to be extremely difficult for the flat earthers to deny. It's also going to be impossible for them to explain it using any of their current flat earth theories. The only scientific explanations are all bound to the accepted spherical earth model and its associated model of the universe.
Second Solar Storm Hits EarthThis is an image taken in Tasmania (Australia) last night 12 September:
"A second of two major solar storms has hit the Earth, creating ideal conditions for colourful night skies over polar regions, but also creating the risk of
disruption to communications and power networks.
Solar wind conditions suggest that this activity will continue for many hours and aurora watchers should be in for a good treat," the centre said, adding it would issue warnings if more "intense storming" occurs.
The second of
two solar storms, in the form of a coronal mass ejection (CME) from a solar flare,
hit Earth on Friday (US time) following the first burst a day earlier".