Volcano Learning ZoneVolcano Learning Zone

Great for School work

Smoke Rings 

Volcano Learning zone > Volcano Glossary

Mt Etna Smoke ring from SE crater 01/06/2000 LKPMt Etna on Sicily blows the best smoke rings. At 100-200m across , the smoke rings appear white and appear to roll in on themselves as they move upwards. It is thought they are formed when gases are rapidly expelled through a narrow conduit.