I don’t recall hearing or reading about them either. But there are all sorts of reflection and refraction phenomenon, some of which are extremely rare. Spaceweather.com had a link to a site which focused specifically on that. I’ll check to see if they still do.
Yes, the link is still there.
Here it is:
Atmospheric Optics
http://www.atoptics.co.uk/
“Light playing on water drops, dust or ice crystals in the atmosphere produces a host of visual spectacles - rainbows, halos, glories, coronas and many more. Some can be seen almost every day or so, some are once in a lifetime sights. Find out where to see them and how they are formed. Then seek and enjoy them outdoors.”