1) Strange cloud seen in Moscow on Oct. 9.
A spokesperson with the Moscow weather department says the explanation is quite simple.
They say the formation is a cloud formed by an intrusion of arctic air and the sun shining from the west.
See the video :http://www.youtube.com/watch?v=uPE9Jl16T5c
2) Romanian strange 'halo' cloud - Oct 28.
Meteorologist explains caused by "Fallstreak" or "hole punch" clouds are formed when water in a cloud formation reaches a temperature of around zero degrees without actually turning to ice. The heavier water falls, usually leaving a circular hole in the cloud. Meteorologists and other scientists are not exactly certain what causes the temperature shift and believe it may have something do with the passage of aircraft.
Read here: http://www.associatedcontent.com/article/2333908/romanian_ufo_cloud_moscow_halo_cloud.html
