Yellowstone Supervolcaon fed by Bigger Plume

   The underground volcanic plume at Yellowstone in the U.S. may be bigger than previously thought, according to a study by geologists. Researchers used seismic waves from earthquakes to build up an image of the hot spot beneath Yellowstone.
   The volcanic hot spot below Yellowstone feeds the hot springs, mud pots and geysers that bring millions of visitors to the U.S. national park each year. But the Yellowstone "super volcano" has erupted violently in the distant past and could do so again at some point. AN article will be published in Geophysical Research Letters journal later this year.

http://www.bbc.co.uk/news/science-environment-13061779