These are white (fog) rainbows. As the name implies, they are rainbows that interact with fog, changing the intensity of the color we see. I understand its caused by the droplet size of the water, but that is as much as I know.
Anyway, they are beautiful, rare, and quite unique.
When I thought about it for awhile, I realized that some people see life through a fog. Oh, not a fog made of water, but one comprised of their own prejudices and pride and enhanced by their most treasured sin. This explains John chapter 9...
John, Chapter 9 (World English Bible)
30 The man (who had been born blind and then healed by Jesus - GDR) answered them, “How amazing! You don’t know where he comes from, yet he opened my eyes. 31 We know that God doesn’t listen to sinners, but if anyone is a worshiper of God, and does his will, he listens to him. 32 Since the world began it has never been heard of that anyone opened the eyes of someone born blind. 33 If this man were not from God, he could do nothing.”
34 They answered him, “You were altogether born in sins, and do you teach us?” Then they threw him out.
35 Jesus heard that they had thrown him out, and finding him, he said, “Do you believe in the Son of God?”
36 He answered, “Who is he, Lord, that I may believe in him?”
37 Jesus said to him, “You have both seen him, and it is he who speaks with you.”
38 He said, “Lord, I believe!” and he worshiped him.
39 Jesus said, “I came into this world for judgment, that those who don’t see may see; and that those who see may become blind.”
40 Those of the Pharisees who were with him heard these things, and said to him, “Are we also blind?”
41 Jesus said to them, “If you were blind, you would have no sin; but now you say, ‘We see.’ Therefore your sin remains.
Jesus will open YOUR EYES so that you can see the world through the eyes of God the Father. And perhaps it will have the aurora of white like those rainbows. Why? Because God is light and truth and righteousness. What a wonderful prism!!!!