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ELECTRIC YELLOWSTONE: Conductivity image reveals magma plume bigger than thought
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Electric Yellowstone: Conductivity image hints volcano plume is bigger than thoughtUniversity of Utah geophysicists made the first large-scale picture of the electrical conductivity of the gigantic underground plume of hot and partly molten rock that feeds the Yellowstone supervolcano. The image suggests the plume is even bigger than it appears in earlier images made with earthquake waves. "It's like comparing ultrasound and MRI in the human body; they are different imaging technologies," says geophysics Professor Michael Zhdanov, principal author of the new study and an expert on measuring magnetic and electrical fields on Earth's surface to find oil, gas, minerals and geologic structures underground. <snip> [ link to www.physorg.com]
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