Yellowstone’s past eruptions have been classified as VEI-8, the highest category on the scale. Impact on the Global Environment A Yellowstone eruption of this magnitude would inject enormous quantities of sulfur dioxide and ash into the stratosphere.
Understanding the Geological Magnitude of a Potential Yellowstone Eruption
The Scale of Historical Yellowstone Eruptions To grasp the potential size of a future Yellowstone eruption, one must first examine the three major eruptions that have occurred in the past. The probability of a supereruption occurring in any given year is estimated to be roughly 1 in 700,000.
The Reality Versus the Hypothetical While the thought experiment of how big the Yellowstone eruption would be is scientifically valuable, it is essential to contextualize the actual risk. This places the event far lower on the list of immediate threats compared to hurricanes, earthquakes, or human-made disasters.
Understanding the Geological Magnitude of a Yellowstone Eruption
Comparing Volcanic Explosivity Scientists use the Volcanic Explosivity Index (VEI) to categorize the magnitude of eruptions, ranging from 1 to 8. The largest historic eruption in recorded history, Mount Tambora in 1815, was a VEI-7 event.
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