I can look directly at it from my roof window now, and when I keep looking it for a few seconds a blue rim quickly appears. Googled it but found no
match to what might cause this.

Originally posted by Corvinus
The reason you are seeing this blue glow is because the moon is 31,000 miles closer to the earth than normal. Because it's orbit around us is not a perfect circle but rather an oval, it gets closer at some points during its revolution period about the earth.
You can read about it on this post:
www.abovetopsecret.com...
edit: It's supposed to seem 14% bigger and 30% brighter.
[edit on 10-1-2009 by Corvinus]