YELLOWSTONE volcano's terrifying eruption should be treated as "a matter of when, not if"

The Wyoming-based volcano is one of the most-feared in the world, and if it were ever to erupt, it could be a civilisation-ender. One scientist, Jacob Lowenstern of the US Geological Survey (USGS), says that when it does, it will only give us two weeks to prepare. He told the 2015 BBC documentary ‘Supervolcano’: “Typically when these eruptions begin, they begin from a certain event, then they get larger as they move along the fracture system.