volcanologists use an eruption magnitude scale called the Volcanic Explosivity Index, or VEI to classify eruptions. This scale assigns a number to an eruption based on things that can be observed ...

Overall, the eruption lowered the planet’s temperature by about 5 degrees Fahrenheit. The eruption registered at a seven on the volcanic explosivity index (VEI), a scale that measures how long an ...

A volcanic eruption in southern Japan 30,000 ... An eruption registering 6 on the VEI scale is regarded as “colossal.” The team members spent two years or so looking at strata in and outside ...

The power of such eruptions is measured using the Volcanic Explosivity Index (VEI), which is a scale that goes from one to eight. Each succeeding VEI is 10 times greater than the last. Need examples?