There were no reports of damage or injuries due to the latest eruption, but blowing ash did fall on some nearby villages and caused the brief shutdown of Catania airport.
After months of displays that have drawn tourists from around the world, Etna fell silent on Oct. 8 after its 16th outburst of 2011.
Then Sunday morning, it began spewing fountains of lava hundreds of feet into the sky, clearly visible for miles around, according to the Italian National Institute of Geophysics and Volcanology.
Before its first eruption this year in January, Mount Etna had not produced a major eruption since 1992.
Photo: Rocco Parisi