Giant smoke rings

A post after a long time now....but I hope that I can keep posting more often!Here are some pics of Mt.Etna(Italy),Europes most active volcano.It is known for periodically belching forth lots(upto 100 per day) of gigantic(upto 600 feet in diameter),long lasting (upto 15 minutes) smoke rings that bellow skyward(upto 18,000 feet).You can check out more pics and movies here