Around 11:30 on March 16, a violent explosion took place near Torre del Filosofo, on Etna. It results from the contact between the snow in thick layer and the front of incandescent lava ... the snow vaporizes, creating a pocket of steam that explodes violently, dispersing lava and hot rocks all around.
Tourists, a BBC team and INGV volcanologists, including our friend Boris Behncke, was in recognition of the location of the eruption. Some people were injured ... Fortunately only bruises, no serious trauma.
Sources: Catania Today and Boris Behncke's message to reassure his friends on Facebook
Since this explosion, a large plume of ash is emitted.