Mount Etna's recent eruptive phases, including the August 2026 summit activity at Voragine crater with Strombolian explosions, lava fountains, ash emissions, and multiple flank vents feeding flows into Valle del Bove, along with ongoing weak ash plumes observed in early September, form the main driver behind the 55% market-implied odds for a VEI 2+ event this year. INGV monitoring shows elevated volcanic tremor and thermal anomalies consistent with moderate explosive output, aligning with the volcano's pattern of frequent VEI 2 eruptions (24 recorded since 1955). Historical data indicate Etna produces such events on average every few years amid near-continuous summit or flank activity, though model consensus on exact ejecta volumes and intensity remains variable. Traders appear focused on whether current or upcoming episodes will meet the VEI threshold before year-end, with INGV bulletins and VAAC advisories providing key resolution signals.