Geologists observing the Yellowstone supervolcano alongside other volcanic systems in the western United States have noted significant ground deformation, higher gas emissions, and a series of minor earthquakes that could suggest magma movement. The magmatic system beneath Yellowstone is among the largest in North America, and experts caution that the existing monitoring and early warning systems throughout the US volcanic arc are insufficient considering the magnitude of the possible danger. The USGS is advocating for greater investment in seismic and gas monitoring efforts.
