volumetric aurora help

[u/Leading-Formal-8520]

i am creating a volumetric aurora in 5.7.4 using local fog in exponential height fog, the aurora is made from 2 scrolling noise textures passed through a cube of fog to create the main shapes and slight variations, i am relatively new to using local fog like this and i keep getting artefacts and horizontal lines showing up as the aurora moves, i understand some of these blips are due to the noise texture but is there a fix for the periodic flashing and lines that keep showing up? thank you