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Is Yellowstone Super Volcano Overdue For Eruption?
The reservoir is filling with magma at an alarming rate.
The volcano erupts with a near-clockwork cycle of every 600,000 years. The last eruption was more than 640,000 years ago – we are overdue for annihilation.
April 23, 2015
Scientists see deeper Yellowstone magma
RESERVOIR OF PARTLY MOLTEN ROCK IS FOUR TIMES BIGGER THAN SHALLOWER CHAMBER
University of Utah seismologists discovered and made images of a reservoir of hot, partly molten rock 12 to 28 miles beneath the Yellowstone supervolcano, and it is 4.4 times larger than the shallower, long-known magma chamber.
The hot rock in the newly discovered, deeper magma reservoir would fill the 1,000-cubic-mile Grand Canyon 11.2 times, while the previously known magma chamber would fill the Grand Canyon 2.5 times, says postdoctoral researcher Jamie Farrell, a co-author of the study published online today in the journal Science.
The researchers point out that the previously known upper magma chamber was the immediate source of three cataclysmic eruptions of the Yellowstone caldera 2 million, 1.2 million and 640,000 years ago, and that isn’t changed by discovery of the underlying magma reservoir that supplies the magma chamber.
“The actual hazard is the same, but now we have a much better understanding of the complete crustal magma system,” says study co-author Robert B. Smith, a research and emeritus professor of geology and geophysics at the University of Utah.
PHYSORG
Read more here: http://phys.org/news/2015-04-scientists-deeper-yellowstone-magma.html
University of Utah
http://unews.utah.edu/news_releases/scientists-see-deeper-yellowstone-magma/
Image credit: University of Utah