Mount Vesuvius remains in a prolonged quiescent phase since its 1944 eruption, with INGV monitoring through mid-2026 recording persistently low seismicity, minimal ground deformation, and only background fumarolic emissions at the green alert level. This multiparametric stability aligns with a low-energy regime dominated by shallow subsidence rather than magma ascent, making a VEI 1+ eruption in 2026 statistically improbable given historical repose intervals that often span decades to centuries. Traders assign the 92.5% “No” probability because current observations match the volcano’s long-term baseline behavior, reinforced by the absence of precursory signals such as deeper hybrid earthquakes or measurable inflation. A sudden seismic swarm or accelerated uplift could prompt reassessment, though such indicators typically require weeks to months to develop into eruptive conditions and would still face significant uncertainty in timing and scale.