Mount Etna has shown fluctuating summit activity through summer 2026, including Strombolian explosions, lava fountaining, and effusive flows from multiple vents in July and August that produced measurable ash plumes and elevated volcanic tremor. As of early September, INGV monitoring reports weak ongoing ash emissions with VONA codes oscillating between orange and red, while the public alert remains at yellow. At roughly 50 percent market-implied odds, traders appear balanced between the volcano’s demonstrated capacity for VEI 2+ events and uncertainty over whether current low-intensity degassing will escalate before year-end. Key variables include sustained increases in tremor amplitude, ground deformation, or SO2 flux that could signal renewed magma ascent, alongside the next weekly INGV bulletins and any shift in effusion rates or seismic swarms. Historical patterns show Etna can transition rapidly between repose and moderate explosive phases, leaving resolution dependent on near-term geophysical indicators.