magma

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Beneath Mount St. Helens, a Heart of (Cold) Stone

The volcano is an outlier in more ways than one

(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... More »

Enormous Magma Reservoir Found Under Yellowstone

There's enough to fill 11 Grand Canyons

(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,... More »

Yellowstone's Magma Patch Bigger Than Thought

Underground 'reservoir' a good 50 miles long and 20 miles wide

(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 "... More »

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