I've seen this a couple times before. The very first time was when I spent the night at my grandmother's house. She told me that the number of stars inside the halo meant something about the upcoming weather. I wish I could remember what it was
this is how the natives forecast the weather. There is a circle around the moon. From the inside of the circle to the moon, however many stars are inside the circle indicates how many days it will be until impeding weather.
My papah taught me this one winter and I laughed at him horribly. There was one star inside the circle and the next morning, I could not drive the half mile to his house because we had 10 inches of snow on the ground. I walked just to apologize to him.
There are many phases of the moon that one can use to determine the weather. And they too are all correct.