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 ...

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 ...

They measure at eight or above on the Volcanic Explosivity Index (VEI) – a scale used to define the size of eruptions. A VEI 8 eruption blows up 1,000km3 of rock, ash, lava and other material ...

The eruption registered at a seven on the volcanic explosivity index (VEI), a scale that measures how long an eruption lasts, how far the volcanic materials spread, and how much volcanic material ...

The Volcanic Explosivity Index (VEI) ranks eruptions by size and power. The scale goes from VEI-0 to VEI-8. It measures ash, lava, and rock ejected. VEI-0 are usually a steady trickle of lava ...