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There are thousands of volcanic features distributed throughout the southwest United States, which are grouped together in volcanic fields. The Yellowstone Volcano Observatory monitors these volcanoes using a combination of techniques. While YVO hasn’t seen anything to suggest magma is on the move, the area is stretched and pulled apart to produce numerous tectonic earthquakes. YVO keeps an eye on these volcanoes and Yellowstone Volcano, as described in this monthly video update by Mike Poland, YVO Scientist-in-Charge. Video:
