supervolcanoes

What Defines A Supervolcano? The term “supervolcano” implies a volcanic center that has had an eruption of magnitude 8 on the Volcano Explosivity Index (VEI), meaning that at one point in time it erupted more than 1,000 cubic kilometers (240 cubic miles) of material. How many Supervolcanoes are there? There are about 12 supervolcanoes on