Subsidence

Five Sentinel-1A radar scans acquired between 3 October and 2 December 2014 were combined to create this image of ground deformation in Mexico City. The deformation is caused by ground water extraction, with some areas of the city subsiding at up to 2.5 cm/month (red). Image: Copernicus data (2014)/ESA/DLR Microwave and Radar Institute–SEOM InSARap study.

Subsidence refers to the sinking of the ground due to groundwater removal, mining, dissolution of limestone (e.g. karst, sinkholes), extraction of natural gas, and earthquakes. (IRDR)