Mount Etna blows smoke rings in rare display

7 months ago
5.55K
News mount etna etna rings etna vortex rings volcanic vortex rings etna volcanic rings sicily

Sicily’s Mount Etna has been puffing near-perfect circles, known as ‘volcanic vortex rings’. This rare phenomenon appears when gas released at high speed takes the shape of the crater. A calm atmosphere and round volcanic vent are required to form the rings.

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