The University of Utah GPS networks are the key elements of crustal deformation
monitoring of the Yellowstone hotspot and Wasatch fault zone, designed to measure ground
deformation in parallel with seismic monitoring networks operated by the University of Utah
Seismograph Stations (UUSS). Ground deformation is related to active volcanic processes and
faulting in Yellowstone, and to faulting in Utah, hence the importance of GPS measurements in
understanding the distribution of volcanic and hydrothermal features, active faults,
contemporary fault loading, fault geometry, etc. The Yellowstone and Wasatch networks
extend across seismically active regions, with the potential for moderate to large earthquakes as
documented in historic and Late Quaternary geologic time. Moreover, magmatic and
hydrothermal activity at Yellowstone produces up to centimeters per year of deformation. Thus
GPS data provide important constraints on modeling and interpretation of active Yellowstone
volcanic processes.