Yellowstone volcano activity: Steamboat Geyser blast lasts ONE HOUR - What does this mean? YELLOWSTONE volcano’s Steamboat Geyser spat plumes of boiling water and steam for more than an hour this week – but is it a sign of increased volcanic activity? Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Health warning: Clade X global pandemic could kill almost one BILLION peopleNonfiction: On the Front Lines of InfertilityEclipse 2018: When is the next solar eclipse? When is partial eclipse of Sun?Mars and Saturn opposition PICTURES: Stunning Hubble telescope photos of distant planetsHow Record Heat Wreaked Havoc on Four ContinentsEclipse 2018: When is the next lunar eclipse over the UK? Blood Moon hidden by clouds