They take out GPS, Satellites, plus we have to re-direct planes away from those areas where they enter the Earths Atmosphere. The last big storm was just up in Canada not more than a few months ago. People as far away as New Mexico were able to see the Northern Light Effect. Some thought that a nuke was set off in Canada.
Guess that when the Mayans predicting those sun-storms, and then NASA validating the intense activity this year as being the strongest for sun flares. Must mean it is true. Especially because the Mayan's had written it down.