magma

(Newser) - Mount St. Helens already stands out as one of the most active volcanoes in the Cascade Arc and the deadliest in the US, since its 1980 eruption claimed nearly 60 lives. It's also an outlier in a literal sense, sitting 30 miles west of the volcanoes that neatly line...

(Newser) - There's enough magma under Yellowstone National Park to fill up the Great Lakes—and then some, according to scientists who say they've taken the best look yet at the "plumbing" system under the volcanic hot spot. The University of Utah researchers used a technique called seismic tomography,...

(Newser) - That Yellowstone has a big blob of molten rock lurking beneath it isn't news to scientists. A new analysis, however, shows that this blob is more than twice as big as they originally thought, reports Nature . Figure about 50 miles long, 20 miles wide, and shaped like a "...