Where are the most dangerous supervolcanoes located and what will happen if they wake up

Volcanoes are sleeping, but it won't last forever. As a rule, supervolcanoes explode once every 100 years, and if this happens, then a catastrophe is inevitable. How many such dangerous volcanoes are there on the planet and where are they located? How do they differ from ordinary ones and ...

0 - 1 of 1