The seismic structure beneath the Yellowstone Volcano Field from ambient seismic noise

We evaluate Rayleigh wave group velocity dispersion (5-40s) around the Yellowstone Volcano Field with ambient noise tomography, measured from vertical component noise correlation functions. We include broadband data from 239 seismic stations (1999-2012), including USArray's Transportable Array and the Noise Observatory for Imaging the Subsurface beneath Yellowstone (NOISY). Short-period (<13s) group velocity anomalies are imaged for the Bighorn Basin (similar to 25% slow) and Range (similar to 20% fast), and the Yellowstone Plateau (similar to 10% fast). Beneath the Yellowstone caldera, Rayleigh wave group velocities are similar to 25% slower than the regional average with slow anomalies (<-15%) observed from 5 to 24s. These values are consistent with a magmatic body being heated from below by an underlying plume.