 Mount Etna in Italy is currently captivating observers by emitting large, circular 'smoke rings.'  This unusual phenomenon, caused by a newly opened crater at the summit, involves gases that are rapidly expelled through a circular vent.  According to scientists, these are actually volcanic vortex rings mostly composed of water vapor, which condenses in the cooler air above the volcano, creating the visible puffs. The activity has reportedly been more frequent than ever, with hundreds of rings forming since it began.

Volcano Etna in Italy is puffing giant smoke rings

Watch: Mount Etna puffs 'smoke rings' in rare display

Mount Etna puffs 'smoke rings' in rare display

Mount Etna Puffs Perfect Smoke Rings Into Sicilian Sky

Volcano Etna in Italy is puffing giant smoke rings

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