Is this how it all ends?
In 1995, worries spread that Yellowstone’s massive crater was rising – like the sort of dome that preceded the Mount St. Helen disaster. But it sank back in 1997. Then it resumed rising with several new geysers appearing, then quit again in 2003. What made it rise? Some geologists speculate that highly explosive gasses and a large chamber of molten magma lurk beneath. Just the right geological shift – such as the park’s 1959 earthquake –could spark a massive blast blanketing most of North America in volcanic ash. Anyone living within 50 miles would be killed instantly. It is estimated that the last explosion sent 240 cubic miles of ash and pumice – that’s 1.1 trillion bushels -- skyward.
By comparison, the famous explosion of the volcanic Indonesian island of Krakatoa in 1883 released about 3 cubic miles of magma.
But there are other supervolcanoes lurking, waiting to blow their tops – and possibly end all life on earth? Unfortunately, yes.