Geodesy and gravimetry allow the analysis of earth structure and strain. These methods are complementary to seismology.
The geodesic observational service of Strasbourg is part of the Réseau National de Géodésie RENAG (national geodetic network). EOST is responsible for 8 GPS stations located in the Rhénan area, assigned to study the tectonic strain of the North-East of France.
EOST is also responsible for the Gravimetric observatory of Strasbourg. Through a supraconductive gravimeter, the observatory provides relative and continuous gravity measurements. The observatory is part of the international project Global Geodynamics Project (GGP).