Trader consensus on Polymarket reflects a 91.5% implied probability for no major volcanic eruption (Volcanic Explosivity Index, or VEI, ≥6) in 2026, driven by the extreme rarity of such events—historically occurring roughly once every 20–50 years globally, with the last at Mount Pinatubo in 1991—and the absence of precursory signals at capable stratovolcanoes or calderas. As of mid-May 2026, the Smithsonian Global Volcanism Program reports 47 confirmed eruptions worldwide this year, including ongoing activity at Kīlauea, but all at low VEI levels (typically ≤4), with no detectable seismic swarms, rapid deformation, or gas emissions signaling a plinian-scale event per USGS monitoring. Realistic challenges include unexpected escalation at restless systems like Campi Flegrei or Taal, though current data shows stable baselines; daily updates from official agencies will track any shifts through year-end.