Time series of vertical displacements during April–October 2017 at four GPS stations on the north side of Yellowstone Lake

Time series of vertical displacements during April–October 2017 at four GPS stations (LAK1, LAK2, LKWY, and SEDG) on the north side of Yellowstone Lake. Downward trends indicate subsidence and upward trends show uplift. Uplift “spikes” in late September are related to inclement weather and do not show true deformation. Error bars are one standard deviation. Bottom plot shows water level measured by stream gage USGS 06186500, located at the outlet of Yellowstone Lake. High gage levels correlate to high lake levels. Note that subsidence of the lake shore occurs simultaneously with increased lake level.