Ground Swelling At Yellowstone

I watched a show about this on the Discovery channel. It was called Supervolcano. It was basically an apocalyptic show about what would happen should Yellowstone erupt. The ground at Yellowstone has been swelling for years. It was first discovered by geologists mapping the grounds.

Yellowstone National Park, once the site of a giant volcano, has begun swelling up, possibly because molten rock is accumulating beneath the surface, scientists report. But, "there is no evidence of an imminent volcanic eruption," said Robert B. Smith, a professor of geophysics at the University of Utah. Many giant volcanic craters around the world go up and down over decades without erupting, he said. Smith and colleagues report in Friday's issue of the journal Science that the flow of the ancient Yellowstone crater has been moving upward almost 3 inches per year for the past three years. That is more than three times faster than ever observed since such measurements began in 1923, the researchers said.