article_snippet.sent: But the magma chamber lying directly beneath a supervolcano surface is not considered large enough to produce such levels, so researchers have been searching for an alternative source for years.
article_snippet.sent: that's so large an enormous secondary chamber
article_snippet.sent: A magma chamber beneath the surface is not considered large enough to produce these levels and now researchers have found an enormous secondary chamber .
article_snippet.sent: the researchers said a relatively small magma chamber, known as the upper-crustal magma reservoir contains around 98 per cent hot rock.
article_snippet.sent: The Yellowstone magmatic system from the mantle plume to the upper crust', published in the journal Science, that the reservoir contains around 98 per cent hot rock.
article_snippet.sent: Researchers said a relatively small magma chamber, known as the upper-crustal magma reservoir, beneath the surface in 2013 that measures 2,500 cubic miles (10,420 cubic km) is believed to have been the source of three Yellowstone eruptions 2 million, 1.2 million and 640,000 years ago.
article_snippet.sent: This lower-crustal magma body has a volume 4.5 times larger than the upper-crustal magma reservoir [and] Yellowstone did erupt, estimates from a National Geographic report are critical to understanding the evolution of basaltic-rhyolitic volcanism and explaining the magnitude of CO2 discharge.'
article_snippet.sent: The presence of magma reservoirs underlying upper crust magma chambers has been inferred at other locations, but not detected.
article_snippet.sent: This lower-crustal magma body added that the upper magma chamber is believed to have been the source of three Yellowstone eruptions 2 million, 1.2 million and 640,000 years ago.
article_snippet.sent: Researchers said the upper magma chamber is believed to have been the source of three Yellowstone eruptions 2 million, 1.2 million and 640,000 years ago .
article_snippet.sent: The magma chamber and reservoir are not getting any bigger than The magma chamber and reservoir have been, it's just that we can see The magma chamber and reservoir better now using new techniques,' added co-author Jamie Farrell, a post-doctoral researcher at the University of Utah.
highlights_snippet.sent: Chamber is four times bigger than the magma chamber above it - but study said Chamber is not posing any additional threat than Chamber was before .