Stromboli volcano (Eolian Islands, Italy): volcano blows giant, perfect smoke ring

Minutes ago, the volcano produced a spectacular „smoke ring“, which was seen rising from the crater area and drifting slowly northeastwards over the village. Its near-perfect circular shape and large diameter (100-200 m?) are truly impressive, perhaps the largest I have ever seen or heard of. Such ring vortexes are rare, but not unknown on Stromboli and other volcanoes; they can form when…