What is that dark circle around the sun today

also there is a rainbow like circle around it

what is this called ?

well the rainbow like circle is not a circle its actually a halo which was caused by a refraction of light through ice crystals in cirrus clouds..

it is called a HALO AROUND THE SUN..

Dark circle around the sun? o.O I didn't notice. I'm not sure :S sorry

Was it like this one?

http://www.youtube.com/watch?v=7txet8C4v-A

If so it may be ice crystals in very thin cirrus clouds :) Hope I helped!

It's hard to say what you are seeing without more details. It's probably a solar halo...see the web page below.

Most likely a sun storm