Until today there is much uncertainty about the phenomenon called ‘UFO Rings’.
Although there are many phenomena which are inexplicable, and attributed to Alien Sightings. but when we talk about ‘UFO-Rings’ many of these rings can be explained as ‘Smoke Rings’ - ’Fire Rings’ - ’Vortex Rings’ or even Halo’s.
A smoke ring / fire ring is a visible vortex ring formed by sudden release of smoke, inflamed by a smoke ring cannon. Vortex Ring Launcher
A vortex ring can be formed also in the atmosphere by a rising (falling) mass of warm (cold) air, which is also called a thermal(microburst). One is occasionally at the core of a mushroom cloud, and they can be seen at fire eater presentations. Wikipedia
“Vortex Rings’ cause UFO confusion
BARRY Rodgers’ black smoke rings have caught the attention of metropolitan newspapers.
Mr Rodgers was surprised to learn that the “mysterious halos”, caused by demonstrations at the weekend’s Emu Gully Air and Land Spectacular, had been confused for Unidentified Flying Objects (UFOs).
“There were unusual atmospheric conditions on the weekend,” Mr Rodgers said.
“Even our pyrotechnician said he had never seen anything like it before.
“Technically (there are caused by) a combination of the pyrotechnics used and the way it was laid out in one of the battle scenarios … it was still a very rare occurrence.”
The Air and Land Spectacular held in Helidon featured fiery explosions and simulated trench warfare.
Reports confirmed that the UFOs were actually smoke rings caused by a natural phenomenon known as a “vortex ring”. thecrhonicle
Halo – Optical Phenomenon
Ice Crystal Halos. A halo also known as a nimbus, icebow or Gloriole) is an optical phenomenon produced by ice crystals creating colored or white arcs and spots in the sky. Many are near the sun or moon but others are elsewhere and even in the opposite part of the sky. They can also form around artificial lights in very cold weather when ice crystals called diamond dust are floating in the nearby air.
There are many types of ice halos. They are produced by the ice crystals in cirrus clouds high (5–10 km, or 3–6 miles) in the upper troposphere. The particular shape and orientation of the crystals is responsible for the type of halo observed. Light is reflected andrefracted by the ice crystals and may split up into colors because of dispersion. The crystals behave like prisms and mirrors, refracting and reflecting sunlight between their faces, sending shafts of light in particular directions. Wikipedia * Atoptics.co.uk
Ice Crystal Halo
Other Halo Phenomenon
sundogs. Passing through the sundogs and extending beyond them is the parhelic circle. It sometimes encircles the whole sky at the same altitude as the sun. Upper and lower tangent arcs touch the 22° halo directly above and below the sun. Acircumzenithal arc is high above all.
22º Circular radius halos are visible all over the world and throughout the year. Look out for them (eye care!) whenever the sky is wisped or hazed with thin cirrus clouds. These clouds are cold and contain ice crystals in even the hottest climes.
22º Circular radius halo
Tangent arcs form when cirrus clouds have well developed columnar ice crystals drifting with their long axes almost horizontal. These are called “singly oriented columns” because having their long axes horizontal is their only orientation constraint. They can take up any rotational position around their long axis and a vertical axis. This crystal orientation is a common one and produces a number of different halos.
Circumscribed halo is typically a brightly coloured oval around the sun. It is tangential to the inner 22º halo directly above and below the sun and it is brightest there. Sometimes local brightenings of the 22º halo are the only sign of it. Its shape depends very much on the solar altitude
More about Halos and other explainable Phenomena: http://www.atoptics.co.uk/
Unexplained ‘UFO Rings’
Fort Belvoir 1957
Orlando Florida 1999
Airplane was approaching Davis Monthan Air Force Base in Tucson Arizona
Detmold, Germany 2009
Russian Giant Sky UFO Ring October 2009
DESPITE MANY SO-CALLED ‘UFO RINGS’ EXPLAINED, MANY SIGHTINGS REMAIN A MYSTERY.