Yellowstone volcano: Why USGS predicted MONTH-LONG eruption in July would bury US in ash A USGS scientists demonstrated during a lecture a shocking simulation of Yellowstone volcano showing a month-long eruption in July that would bury the northern states of the US in a metre of ash. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:ALIEN DISCOVERY: Cigar shaped asteroid to help experts look for extraterrestrialsAustralia Diary: For the BirdsChinese Sperm Bank Seeks Donors. Only Good Communists Need Apply.Elon Musk reveals new spaceship set to COLONISE MARSJupiter in the sky: When to see the Jupiter Triangle this week in April?Pink Moon 2018: When is the Pink Moon in April? What time will it rise?