This phenomenon called Cirrostratus cloud/halo effect. Cirrostratus clouds are thin, generally uniform clouds, composed of ice-crystals, capable of forming halos. When thick enough to be seen, they a.

(by Lumix FX30) I saw this phenomenon this morning (16.May’08 00:50am, Malaysia timezone +8hr), It so amazing and it appeared right in front of me. It like a big light circle around the Moon, it.