Volcano Discovery said: “A significant bush fire started during the peak phase of yesterday’s activity in the Valle del Bove near or on the southern slope of Monte Rinato.
“Initially, the appearance of fumes from this area raised speculations of a possible new vent in the Valle del Bove, but soon were discarded.
“The cause of the fire remains speculative, but most likely, it was ignited by an exceptionally far-travelled hot volcanic bomb that landed in an area of dense, dry vegetation yesterday.”
The fire appears to have gone out as of Monday morning, but Mount Etna is still erupting.
The latest activity began yesterday before 9am on Sunday and peaked by 9.20am local time.