Crustal Deformation and Geohazards in the Greater Yellowstone Region
Three-Dimensional Velocity Field
The vertical, easting, and northing velocities of Yellowstone deformation are created from ascending and descending ENVISAT orbits. The three-dimensional velocity field shows that the majority of observed deformation across the Yellowstone caldera (6-9 cm/yr) and near NorrisGeyserBasin (4-5 cm/yr) occurred in the vertical direction during 2005-2006. Additionally, significant lateral displacements (5-9 cm/yr) in the East-West direction occurred at the southeastern and western rims of the caldera and in the area between HebgenLake and NorrisGeyserBasin. Slight displacements (about 0.1-0.12 cm/yr) in the North-South direction occurred in the southwestern part of the caldera and near YellowstoneLake during the same period of observation. The solid white lines indicate the Quaternary faults.