STORY: Volcanic vortex rings are natural, near-perfect circles of gas emitted from a volcano under specific conditions and scientists say Mount Etna emits more than any other volcano on earth. It is a ...

Tourists in Italy have been treated to quite the show as Mount Etna, the largest active volcano in Europe, has been blowing spectacular “smoke rings” into the sky since last week. The rare phenomenon, ...

Mount Etna in Sicily has been blowing spectacular ‘smoke rings’ into the sky since Wednesday. The volcano, which towers over the historic port city of Catania, is the largest in Europe and one of the ...

VOLCANO VORTEX RINGS: Rare volcanic vortex rings were spotted rising above Mount Etna in Italy recently. The natural phenomenon occurs when gases emitted from the volcano ascend rapidly through the ...

Vortex rings are toroidal structures of fluid characterised by closed-loop vorticity that provide a compelling example of coherent structures in fluid dynamics. Their dynamics involve complex ...

Turbulent ball: William Irvine, Takumi Matsuzawa and colleagues have used this apparatus to track turbulence with lasers and high-speed cameras. (Courtesy: Takumi Matsuzawa) Researchers in the US have ...