Ground Movement Services

The Ground Motion service measures vertical displacements of the order of a millimeter occurring on the Earth's surface. This can be subsidence and/or surrection movements that occur suddenly or slowly. This service is developed in collaboration with Planetek within the Rheticus® platform and is based on the persistent target method (permanent scatters InSAR - PSInSAR). The data are generally processed over a long period of time for better reliability.

Reference Projects

Measurement of Ground Movements on the Anderlues Site (Belgium)

This project aimed to establish an inventory of possible ground movements related to the exploitation of the former mining site of Anderlues, on the one hand by means of a site and surroundings map, and, on the other hand, by identifying potential subsidence and/or surrection zones.
The displacement measurements were carried out between December 2020 and December 2021 using Sentinel-1 images, a European Copernicus radar satellite.
The study showed that all detected displacements are of low amplitude, in most cases less than 20mm of absolute vertical displacement (positive and negative), which reflects a stable trend in the whole area. The dynamics are identical to those of the previous period 2019-2020 with, however, a decrease in terms of subsidence exceeding 10 mm/year.
All project results are provided through the Rheticus® platform.