Volcano under Yellowstone bigger than previously thought

Volcano under Yellowstone bigger than previously thought: "SALT LAKE CITY –  Yellowstone's underground volcanic plumbing is bigger and better connected than scientists thought, researchers reported Wednesday, April 17, at the Seismological Society of America's annual meeting. "We are getting a much better understanding of the volcanic system of Yellowstone," said Jamie Farrell, a seismology graduate student at the University of Utah. "The magma reservoir is at least 50 percent larger than previously imaged.""