GEOLOGY

Detailed explanation-1: -VEI Table. The Volcanic Explosivity Index (VEI) is a scale that describes the size of explosive volcanic eruptions based on magnitude and intensity. The numerical scale (from 0 to 8) is a logarithmic scale, and is generally analogous to the Richter and other magnitude scales for the size of earthquakes.

Detailed explanation-2: -Volume of products, eruption cloud height, and qualitative observations (using terms ranging from “gentle” to “mega-colossal") are used to determine the explosivity value. The scale is open-ended with the largest volcanic eruptions in history (supereruptions) given magnitude 8.

Detailed explanation-3: -Tiltmeters and strainmeters measure subtle changes in ground slope and shape at volcanoes | U.S. Geological Survey. A .

Detailed explanation-4: -For example, the eruption of Vesuvius Volcano in A.D. 79, which destroyed Pompeii and Herculaneum, only rates a VEI of 5.

Detailed explanation-5: -The Volcanic Explosivity Index (VEI) was recorded to be 5, out of a potential 8, its devastation bringing death to around 57 people directly, along with a plane crash and a traffic accident killing a total of 7 more. The cost of the event itself reached to a height of 1.1 billion dollars.