The smoke circles, known as volcanic vortex rings, are actually made of condensed gases and water vapour. They form when gases rise up from deep below the earth and escape inside the crater of a ...
The Independent on MSN10mon
Mount Etna blows ‘smoke rings’ into sky in rare phenomenonVolcanic vortex rings have blown into the sky from the largest active volcano in Europe since Wednesday. Scientists say Mount ...
The 34.4 meter high (that is 37.2 yards to those metrically challenged) vortex was not designed as an attraction, but to channel smoke out of the building in the event of a fire. The architecture ...
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