I don't know what to make of three photos included in the gallery link.
I saw this too before I went out with proper camera, I thought it was a contrail being illuminated almost directly overhead but I have seen tendril like structures in other aurora photos.
It was fairly wide and straight running NW-SE.
Those photos were from someone nearby's phone.
https://postimg.cc/gallery/Dbxz24t
Originally Posted by: four