56% — How many large volcano eruptions (VEI ≥4) in 2026?: 0
Leader: 0 at 56% · Polymarket 56% · 3 contracts · $798 volume · medium confidence
Updated 2026-05-09 06:40:34 UTC

Tracks the leading outcome in a winner-take-all prediction market set with 3 outcomes.

Why this matters:
This contract prices the probability of zero large volcanic eruptions (VEI ≥4) occurring during 2026 at 54%, meaning markets estimate roughly even odds that the year will experience at least one such eruption. Major volcanic activity depends on geological conditions that operate on multi-year timescales, though forecasting remains inherently uncertain. The current probability reflects baseline expectations adjusted for recent volcanic patterns. Resolution depends on scientific classification of any eruptions that occur during the calendar year 2026, with criteria clearly defined by volcanic explosivity index standards. Uncertainty could shift materially if seismic activity increases at known high-risk volcanic zones or if existing active volcanoes show measurable acceleration in precursor signals.

Key factors:
- Baseline volcanic frequency: Historical records show VEI ≥4 eruptions occur roughly once per 1-2 years globally on average, making zero eruptions in a single year plausible but not the most common outcome
- Current volcanic activity status: Active monitoring of major volcanic regions (Indonesia, Philippines, Mexico, Iceland) shows present activity levels and whether any volcanoes display accelerating seismic or deformation patterns
- Geographic distribution of at-risk volcanoes: The number of volcanoes globally classified as actively restless or in heightened alert status provides a quantifiable baseline for eruption risk assessment
- Definition and classification clarity: VEI ≥4 threshold is objective, but borderline eruptions between VEI 3 and 4 may face definitional disputes that could affect contract settlement
- Time remaining in 2026: With approximately seven months elapsed, roughly 60% of the year remains, allowing sufficient time for previously dormant volcanoes to activate

Contracts:
- How many large volcano eruptions (VEI ≥4) in 2026?: 0 — 56¢ Polymarket $421 (weight 53%)
- How many large volcano eruptions (VEI ≥4) in 2026?: 1 — 37¢ Polymarket $69 (weight 9%)
- How many large volcano eruptions (VEI ≥4) in 2026?: 2 — 5¢ Polymarket $308 (weight 39%)

Cite as: "56% per prediction markets (SimpleFunctions, May 2026)"
Canonical: https://simplefunctions.dev/answer/how-many-large-volcano-eruptions-vei-4
Full data: https://simplefunctions.dev/api/public/query?q=How%20many%20large%20volcano%20eruptions%20(VEI%20%E2%89%A54)%20in%202026%3F%3A%200
Provider: SimpleFunctions — https://simplefunctions.dev