The uplifting area is surrounded by a ring-shaped area of subsidence, which is occurring at a rate of ; the total width of deforming terrain is about although is it not clearly visible in all InSAR data. This joint uplift-subsidence has been called a sombrero pattern and the subsidence may reflect either a sideward or an upward migration of magma. A second, shallow subsidence area has been found south of Uturuncu which may relate to changes in a hydrothermal system.