VEI (Volcanic Explosivity Index)

The Volcanic Explosivity Index (VEI) is a scale used to measure the explosiveness of volcanic eruptions. It ranges from 0 to 8, with higher numbers indicating more powerful eruptions. Each level considers factors like the volume of erupted material, eruption height, and duration. For example, a VEI of 0 represents gentle eruptions, while a VEI of 8 describes catastrophic events like the eruption of Yellowstone. This index helps scientists communicate the potential impact of eruptions and assess their risks to communities and the environment.