May 27, 2015: A floating black ring which mystified a Brazilian town has turned out to be a smoke special effect generated by a show in a nearby park
A floating black ring which mystified an Argentinian town has been identified.
The mysterious cloud which was filmed yesterday floating motionlessly above Tigre, in the northern suburbs of Buenos Aires, was originally put down to a meteorological or astronomical phenomenon.
In the footage, the effect lasted less than a minute, first seen as a solid O-shaped ring before finally being dispersed by the wind.
But as it turns out, the gloomy-looking fog was actually man-made, generated as part of a special effect in the nearby Parque de la Costa's aptly-named production "Zombie Invasion".
Meteorologists told local media Tuesday's overcast weather meant the grey-black smoke was more visible against the white clouds.
While it is still not clear just how this one was created, a similar black ring caused a sensation last year when British schoolgirl Georgina Heap recorded video of the phenomenon on her smartphone.
The "Black Ring of Leamington Spa" was eventually traced to a fireworks test at nearby Warwick Castle, located in the county town of Warwickshire.
While another two instances, this time in the US, were separately attributed to a pyrotechnic test and electrical transformer explosion.
One thing that is sure, creating smoke vortices generally requires a blast through a circular structure.
This may be something as unplanned as a factory smokestack or intended like this specially designed apparatus, which was erected at the Burning Man festival in Nevada's Black Rock Desert in 2008.
May 27, 2015: A demonstration of how a black smoke ring is created at Burning Man in 2008.
Sources: Clarin, NBC
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