Jefferson D G Hungerford¹, Michael P Poland², Shaul Hurwitz³, Jamie Farrell⁴, Erin B White¹ and Wendy K Stovall⁵, (1)Yellowstone National Park, Geology Program, Mammoth Hot Springs, WY, United States, (2)USGS, Yellowstone Volcano Observatory, Vancouver, WA, United States, (3)U.S. Geological Survey, Menlo Park, CA, United States, (4)University of Utah, Geology & Geophysics, Salt Lake City, UT, United States, (5)US Geological Survey, Menlo Park, CA, United States