Will there be at least 3 VEI4 eruptions worldwide in 2026

30-day trend

Analysis

This tracks the probability that the world experiences three or more volcanic eruptions reaching VEI4 magnitude—explosivity index 4, capable of regional ash fall—during 2026. The 6% probability reflects the rarity of such events; since 1950, fewer than one VEI4 eruption occurs annually on average. The current level is driven by baseline volcanic frequency and whether any existing volcanic systems show elevated activity. As of mid-June 2026, resolution depends on monitoring data from known volcanic hotspots including the Ring of Fire and Mediterranean regions. Any new major eruption would increase the likelihood of reaching the three-event threshold by year-end. The primary uncertainty is whether precursory seismic or geochemical signals indicate imminent eruptions at currently monitored volcanoes.

• ›Historical VEI4 frequency averages approximately 0.9 eruptions annually worldwide, making three occurrences in a single year a statistical outlier
• ›Current volcanic activity status at major monitoring networks (USGS, Smithsonian GVN) determines baseline risk for the remaining six months of 2026
• ›Existing or emerging eruptions already in progress or showing elevated precursory activity would proportionally increase the conditional probability of additional events
• ›Geographic clustering effects mean eruptions often correlate with regional tectonic cycles, potentially enabling multiple VEI4 events within a short timeframe
• ›Real-time seismic and gas-emission monitoring data from Ring of Fire and convergent plate boundaries provides the most predictive signal for imminent major eruptions

What moved the line

• Jun 21At least 1↓20pp32→12¢ · Kalshi
• Jun 17At least 2↓11pp22→11¢ · Kalshi
• Jun 23At least 2↑10pp3→13¢ · Kalshi
• Jun 21At least 2↓8pp11→3¢ · Kalshi
• Jun 17At least 1↓6pp38→32¢ · Kalshi

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How we compute these odds