I'm not sure if it was another normal phenomenon, but I'm thinking it was not a parhelion. I think the parhelion in the picture probably looks more like a cross because of the way the sunbeams often come out photographs. That's just my guess from the outdoors photography I've done. To the naked eye, I'd bet that scene probably looked more like just 4 dots behind a dome. I don't think the dots would have looked so connected in real life.
But I don't know. The rainbow bit is certainly interesting. Regardless, praise the Lord.