Mount Etna blows smoke rings in rare display

11 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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