When we visited Yellowstone this summer, they told us we were on top of a volcano, but it's a little hard to believe until you see something like this. Yellowstone Association E-Newsletter January 2010 Scientists have confirmed the existence of a magma plume under Yellowstone that fills a magma chamber 20 percent larger than previous estimates. Using a network of 150 seismographs that recorded seismic waves from earthquakes around the world a s they passed over an area extending from Missoula, Montana, to Evanston, Wyoming, a team of scientists was able to create a first-of-its-kind three-dimensional image of the plume. Recent scientific debate has focused on whether volcanoes such as Yellowstone were created by magma plumes-fingers of molten rock rising from deep in the Earth-or from shallow pockets of magma. The research, which involved scientists from Utah, Massachusetts, Michigan, Norway, Taiwan, and Switzerland, not only confirms the existence of a plume, but also indicates it
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