Ground subsidence in karst terrain underlain by limestone and salt. (a) Cumulative vertical deformation in Santa Rosa Spring. (b) Time-series cumulative vertical deformation at C, D, and E points of Fig. 3a. (c) Cumulative vertical deformation around abandoned wells in Imperial, Texas. Inset represents the averaged deformation rate in a boxed region by stacking interferograms of less than 12 days. (d) Time-series cumulative vertical deformation at F, G, H, I, J, and K of Fig. 3c. (e) Vertical deformation rate around Wink sinkholes. The figures including spatial information have been created using open-source software GMT 5.2.2_r15292 available at http://gmt.soest.hawaii.edu/projects/gmt/wiki/Download. The NAIP images used as a background of the figures were downloaded in 2017 through Geospatial Data Gateway https://datagateway.nrcs.usda.gov provided by USDA.