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.

Definition

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)

Related content

Data Source

Publishing institution: Geoscience Australia
The Digital Earth Africa (DE Africa) Map is a website for map-based access to spatial information. It’s is still being developed by Data61 CSIRO in collaboration with Geoscience Australia. DE Africa is leveraging international Earth Observation (EO) data and science to produce new information and services that benefit African countries. Through translating data into ready-to-use insights, more informed decisions about soil and coastal erosion, agriculture, deforestation, desertification, water quality and changes to human settlements can be made. The data is organized in data-cubes and will be fully available by 2020.
Publishing institution: European Space Agency (ESA)
ESA's Earth Observation Thematic Exploitation Platform (TEP) is a browser for satellite imagery and specific products on an environmental topic. The TEP platforms are divided into 7 categories: Coastal; Forstry; Geohazards; Hydrology; Polar; Urban; and Food Security. Each platform is a collaborative, virtual work environment providing access to EO data and the tools, processors and Information and Communication Technology resources required to work with them. TEP aims to bridge the gap between the users and the data and tools.

Actualités

Ground deformation map of Pistoia in Tuscany. Using data acquired between 2014 and 2019 from the Copernicus Sentinel-1 mission, the map shows subsidence in red and uplift in blue. Image: ESA/TRE ALTAMIRA.

The lowering or sinking of the ground’s surface, referred to as land subsidence, can cause serious damage to infrastructure and private property, and in turn, have an adverse impact on communities, individuals, and the economy. The European Space Agency’s (ESA) Sentinel-1 satellite, part of the Copernicus programme, is being used to monitor cases of land subsidence and contribute to risk assessment and urban development efforts.

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Publishing date: 30/05/2019

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