Just as seismologists measure the size of an earthquake using the Richter scale, volcanologists use an eruption magnitude scale called the Volcanic Explosivity Index, or VEI to classify eruptions.

This scores an 8 on the Volcano Explosivity Index (VEI), a scale that measures the volume of material ejected, as well as the height and intensity of the eruption plume. A supereruption is "over ...

Here's how the largest volcanic eruptions measure up. 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 ...

That measured six on the Volcano Explosivity Index (VEI) scale when the eruption column reached a height of 24km. The last time Taal had an eruption on that sort of scale was about 5,500 years ago ...

The Tonga event is unlikely to do that Early data suggests the Tonga event could have measured as high as five on the volcanic explosivity index (VEI). This would certainly make it the most ...

AIST researchers have been re-examining eruptions of 6 or higher on the volcanic explosivity index (VEI) since the magnitude-9.0 Great East Japan Earthquake in 2011. An eruption registering 6 on ...