Yes, it certainly is. I wish I would have seen it. It’s been too cloudy tonight to see anything. We had a lot of lightning earlier and a very brief power outage. I may take a peek or two as I wake up during the night.
I don't know how often they're that color. It actually looks more purple in the original. I saw quite a few pictures taken by different people on FB. This one was taken by a good friend of mine.
Here's a FB link to view some that were taken by a professional. He took these at the lake.