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Volcanologists have been tracking the movement of magma under the park and have calculated that in parts of Yellowstone the ground has risen over seventy centimetres, almost two and a half feet, since 1923, indicating a massive swelling underneath the park.
“The impact of a Yellowstone eruption is terrifying to comprehend.” says Professor McGuire. “Magma would be flung 50 kilometres into the atmosphere. Within a thousand kilometres virtually all life would be killed by falling ash, lava flows and the sheer explosive force of the eruption. One thousand cubic kilometres of lava would pour out of the volcano, enough to coat the whole of the USA with a layer 5 inches thick. The explosion would be the loudest noise heard by man for 75,000 years.”
An interesting but very scary read:
Online Journal
Update: Found another link… some stuff from the loopies but also some more interesting explanations and pictures
http://exodus2006.com/supervol.html
