The TIGER Symposium in Geodesy is the official symposium of the International Association of Geodesy (IAG) Commission 3 on Earth rotation and geodynamics. TIGER stands for Tracking and Investigating Geodynamics and Earth Rotation. The 2026 edition will mark the very first meeting of IAG Commission 3 – September 28th to October 1st, 2026.
Commission 3 studies the entire range of physical processes associated with the movement and deformation of the Earth in response to both external and internal forces. In addition to the core focus of Commission 3, the TIGER Symposium will also highlight themes traditionally addressed at the Journées meetings. The TIGER Symposium in Geodesy is also supported by the International Earth Rotation & Reference System Service (IERS), a service of IAG contributing to global reference systems and Earth orientation science.
To foster collaboration across disciplines, IAG Commission 3 works closely with several other IUGG associations – International Association of Volcanology and Chemistry of the Earth’s Interior (IAVCEI), International Association of Cryospheric Sciences (IACS), and International Association of Seismology and Physics of the Earth’s Interior (IASPEI) – through a number of joint sub-commissions, making the TIGER Symposium a place where different geoscientific communities can come together and share and discuss their work.
Following the TIGER Symposium in Geodesy, two more meetings will be arranged in Gävle:
GGOS Topical Meeting on Geohazards, October 2nd, 2026
GGOS Days 2026, October 5th to 7th, 2026
Lantmäteriet is proud to host all these meetings in Gävle (Sweden).
Topics
Contributions on the following topics are welcome:
- Earth rotation (measurement techniques, short vs. long-term variations, climate and angular momentum, core-mantle interactions, atmosphere-ocean-hydrology effects, reference frame links, space geodesy synergies, prediction models at various time scales, interactions between EOP and geophysical models, …) – see the subcommission and working groupwebsites for more details
- Earth tides (solid Earth tides, ocean tide and non-tidal loading, atmospheric loading, hydrological loading, tidal dissipation, earth rheology, tidal measurements (instruments), pole tides, Moon tides, …) – see the subcommission website for more details
- Cryospheric and hydrologic deformation (ice mass loss, glacier dynamics, grounding line migration, ice–ocean–Earth coupling, sea-level impacts, polar GNSS networks, glacial isostatic adjustment, Earth rheology, climate model links, seismicity, …) – see the subcommission, study group and working group websites for more details
- Volcanogeodesy (GNSS & InSAR monitoring, magma source modeling, early warning systems, multi-sensor integration, real-time monitoring, volcano-tectonic links, submarine volcanism, hazard assessment, …) – see the subcommission website for more details
- Seismogeodesy (co-seismic monitoring, post-seismic deformation, GNSS-seismic-InSAR integration, finite-fault modeling, tsunami warning, strain accumulation, …) – see the subcommission website for more details
