Reply To: Alphabet Game – RAIN Home of the Scrapbook Campus › Forums › Lobby › Chit Chat › Alphabet Game – RAIN › Reply To: Alphabet Game – RAIN May 29, 2020 at 4:08 pm #43390 Dorothy DonnParticipant 202Enthusiast X = X-Ray Flare Class In solar-terrestrial terms, rank of a flare based on its X-ray energy output. Flares are classified by the order of magnitude of the peak burst intensity (I) measured at the earth in the 1 to 8 angstrom band as follows:
