Mount Etna blows ‘smoke rings’ into sky in rare phenomenon
  • 14 days ago
Mount Etna in Sicily, the largest active volcano in Europe, has been blowing spectacular “smoke rings” into the sky since Wednesday. The "volcanic vortex rings", a rare phenomenon that is generated by the combination of rapid gas release and the vent shape, spewed out of a new crater that opened on Tuesday on Etna's summit.Source: AP