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Monday, April 27, 2015

MAGMA DISCOVERED BENEATH YELLOWSTONE SUPERVOLCANO

FROM:  NATIONAL SCIENCE FOUNDATION
Yellowstone magma discovery
NSF-funded seismologists at the University of Utah discover magma hidden beneath Yellowstone's supervolcano

A team of University of Utah seismologists has discovered a reservoir of hot, partly molten rock hidden 12 to 28 miles beneath Yellowstone's supervolcano--enough to fill the 1000 cubic-mile-Grand Canyon more than 11 times. The pool is over four times larger than a shallower, long-known magma chamber.

The National Science Foundation (NSF)-funded team, developed a new technique that uses both local and distant earthquake data from the University of Utah Seismograph Stations and the NSF-funded EarthScope array of seismometers. The combined data resulted in a better, deeper and more complete image of the system. The newly discovered reservoir carries hot and partly molten rock upward from the top of Yellowstone's hotspot plume--about 40 miles below the surface.

Yellowstone's plumbing system is no larger or closer to erupting than before, scientists are just seeing more of it than ever before. Yellowstone is among the world's largest supervolcanoes, with frequent earthquakes. The team believes these new models help us gain a better understanding of Yellowstone's plumbing system, and may lead to improved estimates of the potential future seismic and volcanic hazards.

-- Dena Headlee,
Investigators
Fan-Chi Lin
Related Institutions/Organizations
University of Utah