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Scientists classify solar flares according to their x-ray brightness in the wavelength range 1 to 8 Angstroms. There are 3 categories: X-class flares are big; they are major events that can trigger planet-wide radio blackouts and long-lasting radiation storms. M-class flares are medium-sized; they can cause brief radio blackouts that affect Earth's polar regions. Minor radiation storms sometimes follow an M-class flare. Compared to X- and M-class events, C-class flares are small with few noticeable consequences here on Earth. spaceweather.com...
Originally posted by SaneThinking
how big of a flare M- class - X- class would we need to hit earth to see the northern lights close to the 49th, would this recent one directed at us effect the aurolal ovel enough to push them this far south