These belts are shaped like two nested doughnuts. Their dimensions improve depending on solar activity and, sometimes, on how we model them. “The 1953 expedition yielded a extraordinary new discovering, namely the very first immediate detection with the electrons which, we surmised, were being the primaries for developing auroral luminosity,” https://radiationzoneofthesun85048.wikipublicist.com/5238489/a_review_of_zone_radiative_soleil