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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: Yellowstone Gets a CT Scan
11 April 2011 4:40 pm
Yellowstone National Park is indeed an electrifying place. Researchers have used observations of Earth's electromagnetic field collected at more than 100 sites surrounding the park to create a CT scan-like image of the plume of hot rock responsible for today's geysers and hot springs (main image) as well as past volcanic activity in the region. Variations in the conductivity of rock underlying the region—which conducts electricity in some places as well as seawater does (dark red, inset)—reveal zones rich in molten silicate rocks and hot briny fluids, the researchers report in a forthcoming issue of Geophysical Research Letters. The plume may stretch more than 600 kilometers westward of the Yellowstone basin, the new report suggests. In the past decade or so, several other teams of geoscientists, including one with one of the researchers making the new report, have spotted the plume using seismic waves. The electromagnetic image of the plume is broader than the one derived from seismic data but doesn't extend as deep, largely because the electromagnetic waves the study analyzed can penetrate only 300 kilometers or so of Earth's crust.
See more ScienceShots.