Auto adjust. I cropped foreground.

Taking photos of tule fog in valley east of our home. It was so thick one could only see covered sun. Like in dense smoke. I continued to photograph manzanita’s in the rising fog.and when i went in the house and starting looking at the photos on my iPad, I saw this one. I didn’t see the fogbow till then. After reading some about fogbow’s on your site, I then wondered if it was really a fogbow. The photo was taken to the east and even though I couldn’t directly see the sun , I think it was directly behind the fogbow. So what is this? In the photo, I could faintly see come rainbow like color.