Uplift and subsidence of Yellowstone during 1976-1999

Successive profiles across the Yellowstone caldera showing surface uplift and subsidence from repeated leveling surveys between Lake Butte and Mount Washburn. From 1976 to 1984, maximum uplift near LeHardys Rapids was nearly 180 millimeters (7 inches) at an average rate of 22 millimeters per year (0.9 inch per year). Uplift stopped during 1984-85, and from 1985 to 1998 the caldera floor subsided at rates of 9-35 millimeters per year (0.3-1.4 inch per year).