The International Union for Geodesy and Geophysics (IUGG) is a non-governmental, non-profit, international organization established in Brussels on 28 July 1919. The IUGG is dedicated to the promotion and coordination of scientific studies of the Earth and its environment in space. These studies include the shape of the Earth, its gravitational and magnetic fields, the dynamics of the Earth as a whole and of its component parts, the Earth's internal structure, composition and tectonics, earthquakes and elastic wave propagation, the generation of magmas, volcanism and rock formation, the hydrological cycle including snow and ice, all aspects of the oceans, the atmosphere, ionosphere, magnetosphere and solar-terrestrial relations, and analogous problems associated with the Moon and other planets. IUGG encourages the application of this knowledge to societal needs, such as mineral resources, mitigation of natural hazards and environmental preservation.

IUGG is comprised of 8 scientific Associations:

  • International Association of Cryospheric Sciences (IACS)
  • International Association of Geodesy (IAG)
  • International Association of Geomagnetism and Aeronomy (IAGA)
  • International Association of Hydrological Sciences (IAHS)
  • International Association of Meteorology and Atmospheric Sciences (IAMAS)
  • International Association for the Physical Sciences of the Ocean (IAPSO)
  • International Association of Seismology and Physics of the Earth's Interior (IASPEI)
  • International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI)

and 6 Union Commissions:  

  • Union Commission on Climatic and Environmental Changes (CCEC)
  • Union Commission on Mathematical Geophysics (CMG)
  • Union Commission on Geophysical Risk and Sustainability (GRC)
  • Union Commission on the Study of the Earth's Deep Interior (SEDI)
  • Union Commission on Data and Information (UCDI)
  • Union Commission on Planetary Sciences (UCPS)

By providing a framework for collaborative research and information exchange through its Associations and Unions Committees, the IUGG is promoting and shaping Earth system research. Scientific meetings allow Earth and space scientists from all countries of the world to discuss their respective methodologies, results, and hypotheses, and to plan collaborative research projects. Publications, trainings and videos inform researchers, students, technicians and the general public about topics such as environmental protection or human security. Standardization procedures provide rules for scientific definitions, procedures and practice, international reference systems, and the free exchange of data. The resolutions adopted at the General Assemblies of the IUGG serve science policy questions which the members have agreed on.

More information about the Union can be found on the English and French-language IUGG homepage


IUGG Secretariat

Helmholtz-Centre Potsdam
GFZ German Research Centre for Geosciences
Telegrafenberg, A17
14473 Potsdam

Tel. +49 (0) 331 288-1978


IUGG Secretary General

Dr. Alik Ismail-Zadeh
KIT Karlsruhe Institute of Technology
Institute of Applied Geosciences
Adenauerring 20b
76131 Karlsruhe

Tel. +49 (0) 721 608 44610

IUGG Publications

  • International Union for Geodesy and Geophysics (IUGG), Ismail-Zadeh, A. (Eds.) (2017): IUGG Annual Report 2016, IUGG Annual Report, Potsdam : IUGG Secretariat, GFZ German Research Centre for Geosciences, 136 p.

Executive Secretary / Assistent Secretary General

Profile photo of  Dr. Franz Gunther Kuglitsch

Dr. Franz Gunther Kuglitsch
Space Geodetic Techniques

Building A 17, room 10.32
14473 Potsdam
tel. +49 331 288-1978


Profile photo of   Katrin Gundrum

Katrin Gundrum
Space Geodetic Techniques

Building A 17, room 10.04
14473 Potsdam
tel. +49 331 288-1102