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:Microsoft Spends Big to Build a Computer Out of Science FictionPhilippines to Declare Marine Sanctuary in South China SeaOut There: Telescope That ‘Ate Astronomy’ Is on Track to Replace HubbleOut There: Telescope That ‘Ate Astronomy’ Is on Track to Surpass HubbleCocka-ToolsScienceTake: Figaro, the Toolmaking Cockatoo