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You are here: Home1 / IAG Commission 32 / Meetings3 / TIGER Symposium in Geodesy 2026
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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 group websites 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

Scientific Committee

The scientific organizing committee is based on the members of the IAG Commission 3 Steering committee plus a member of the Journées meetings.

Rebekka Steffen (Lantmäteriet, Sweden)
José M. Ferrándiz (University of Alicante, Spain)
Séverine Rosat (Univ. Strasbourg, France)
Xiaoming Cui (APM of Chinese Academy of Science, Wuhan, China)
Susanna Ebmeier (University of Leeds, United Kingdom)
Matthew Head (University of Illinois Urbana-Champaign, USA)
Sigrid Böhm (TU Wien, Austria)
Christopher Dieck (United States Naval Observatory, USA)
Karen Simon (Canadian Geodetic Survey, Ottawa, Canada)
Matthias Willen (TU Dresden, Germany)
Carsten Ludwigsen (DTU Space, Lyngby, Denmark)
Jean-Mathieu Nocquet (Université Côte D’Azur, IRD, CNRS, OCA & Institut de Physique du Globe de Paris)
Masayuki Kano (Tohoku University, Japan)
Carla Braitenberg (University of Trieste, Italy)
Grace Carlson (University of California, Berkley, USA)
Lambert Caron (Jet Propulsion Lab., California Institute of Technology, Pasadena, USA)
Cheng-Li Huang (Shanghai Observatory, China)
Christian Bizouard ( Observatoire De Paris, France)
Tonie van Dam (University of Utah, USA)
Pavel Novak (University of West Bohemia in Pilsen, Czech Republic)
Ezequiel Antokoletz (BKG Leipzig, Germany)
Chikondi Chisenga (Malawi University of Science and Technology, Malawi)
Laura Fernández (National University of La Plata, Buenos Aires, Argentina)
Alberto Escapa (University of León, Spain)
Laura Sánchez (TU Munich, Germany)
Jérémy Rekier (Royal Observatory of Belgium, Belgium)
Anna Riddell (Geoscience Australia, Australia)

Dates

  • 15 April 2026  –  Abstract submission deadline
  • 15 April 2026  –  Application deadline for early career travel support
  • 1 June 2026  –  Notification of abstract acceptance
  • 15 June 2026  –  Final scientific programme release
  • 15 July 2026  –  Early-bird registration
  • 31 August 2026  –  Final registration deadline
  • 28 September – 1 October 2026  –  TIGER Symposium in Geodesy
  • 31 January 2027  –  Deadline for paper submission to the IAG Symposia Series by Springer

Abstract submission will open in November 2025.

Abstract Submission

All colleagues working on the topics of Earth rotation and geodynamics or related themes are invited to submit an abstract by 15 April 2026. Abstracts received after this deadline will not be accepted and will not be included in the final programme of the conference. Authors will be informed of the acceptance/rejection of their abstract by email by 1 June 2026. By submitting an abstract, the author or one of the authors of a joint work is required to complete the online registration before 15 July 2026. If no registration has been received by that date for one of the authors of the abstract, it will not be included in the meeting programme. If authors know that their presentation will not be presented, they are asked to withdraw their abstract as soon as possible (by contacting ).

  • Participants are invited to submit their papers to the IAG Symposia Series, published by Springer. The IAG Symposia Series is published Open Access, and free of charge to the authors. The cost of publication is borne by the IAG. All presentations, poster and keynote, are eligible. All Symposia Series volumes are peer reviewed and submitted for indexing.
  • No more than one abstract can be submitted by the same first author (except keynote presenters).
  • Abstracts cannot be submitted by fax or email.
  • Abstracts will be for poster presentations only (except invited abstracts by keynote speakers).

When submitting an abstract, presenting authors are required to provide the following information:

  • Title (up to 30 words)
  • Author(s)
  • Affiliation(s)
  • Main body of the abstract (up to 300 words).
  • Keywords (please include 3–5 keywords).
  • Topic (select 1 out of 5 TIGER2026 topics: Earth rotation, Tides, Cryospheric and hydrologic deformation, Volcanogeodesy, Seismogeodesy)
  • Intention to submit a paper to the IAG Symposia Series (yes/maybe/no)

The abstract submission form will be available once abstract submission is open.

 

Licence and copyright

The following licence and copyright agreement is valid for any abstract submitted to the TIGER 2026 Symposium in Geodesy:

In submitting the abstract, the authors certify that (1) they are authorised by their co-authors to submit the abstract; (2) they secure the right to reproduce any material that has already been published or copyrighted elsewhere; (3) they agree to the following license and copyright agreement:

  • Copyright on any abstracts is retained by the author(s).
  • Authors grant any third party the right to use the abstract freely if its original authors and citation details are identified.

The abstract is distributed under the Creative Commons Attribution 3.0 Unported Licence.

Registration will open in early 2026.

Registration

The meetings will take place in person & online. However, virtual attendees cannot give presentations. Registration will be open from 1 February 2026 to 31 August 2026. The deadline for Early Bird registration is 15 July 2026. By registering, the participants agree that their data will be stored internally in the conference records. The data will only be used for meeting-related organisational issues. Acceptance of abstracts will be confirmed by 1 June 2026.

Registration fees for in-person attendance

Undergraduate & MSc students *      TBD

PhD candidates/students *                TBD

IAG members / retired scientists *     TBD

Regular                                              TBD

Registration fee includes access to conference facilities, lunch, morning and afternoon tea/coffee, ice breaker, conference dinner, and conference proceedings at the IAGS Proceedings Series in Springer Nature.

On-site registration and cash payments are not available.

* For student and retired scientist prices, a justification will be required. A confirmation letter by the head of the Department/School/University is required for PhD, MSc and Undergraduate student status verification. Please send a copy of your justification to .

The link to in-person registration will be published in early 2026.

Cancellation policy

Early bird and regular registrations cancelled before 10 August 2026 will have a 20 € processing fee deducted from their refund. Cancellations received between August 11 and August 31 2026 are eligible for 50% refund of the registration fee. No refund is available for cancellations made after 1 September 2026.


Registration fees for virtual attendance

Virtual attendance is free, but registration will be necessary. Virtual attendance allows participants to listen to all talks and join the discussions; however, virtual attendees cannot give presentations.

The link to virtual registration will be published in early 2026.

The TIGER2026 Symposium in Geodesy will be held from 28 September to 1 October 2026 at Gävle Konserthus.

Daily sessions are scheduled between 08:30 and 17:30, with a lunch break between 12:30 and 13:30 (see detailed programme below). The icebreaker of the symposium will be on Sunday evening at Gävle Konserthus and the conference dinner on Wednesday evening at Lilla Gasklockan.

Format

08:30 – 09:30 Keynote presentations
09:30 – 10:15 General discussion
10:15 – 10:45 Coffee break
10:45 – 12:30 Poster presentations (short summaries of each poster)
12:30 – 13:30 Lunch break
13:30 – 14:30 Poster viewing time
14:30 – 15:30 Keynote presentations
15:30 – 16:15 General discussion
16:15 – 16:45 Coffee break
16:45 – 17:30 Summary of the day

By day

Sessions

Oral session 1: Earth rotation (SC3.3 and JWG3.1)
Oral session 2: Earth rotation (SC3.3 and JWG3.1)
Oral session 3: Earth rotation and tides (SC3.1, SC3.3 and JWG3.1)
Oral session 4: Earth tides and geodynamics (SC3.1)
Oral session 5: Hydrologic signature in geodetic observations (WG3.1)
Oral session 6: Cryospheric deformation (SC3.4, JSG3.1)
Oral session 7: Seismogeodesy (SC3.5)
Oral session 8: Volcanogeodesy (SC3.2)

Poster session 1: Earth rotation
Poster session 2: Earth rotation & Earth tides and geodynamics
Poster session 3: Hydrologic signature in geodetic observations & Cryospheric deformation
Poster session 4: Seismo- and volcanogeodesy

Keynote speakers

TBA

Code of condcut

The workshop will follow the Code of Conduct of The International Union of Geodesy and Geophysics (IUGG) and their anti-harassment guidelines. IUGG opposes any discrimination or harassment based on such factors as age, citizenship, disability, ethnic origin, gender identity, language, political or other opinion, religion, or sexual orientation. We will follow IUGG’s Anti-Harassment Guidelines to prevent any form of harassment or discrimination, and to ensure an inclusive atmosphere that encourages the free expression and exchange of scientific ideas and results.

All attendees of the TIGER Symposium in Geodesy 2026 have a role to play in creating an inviting and harassment-free environment through their own behavior and by discouraging harassment and discrimination by others.

Behavior

  • All attendees of the TIGER Symposium in Geodesy 2026 are treated with respect and consideration, valuing a diversity of views and opinions.
  • The TIGER Symposium in Geodesy 2026 creates an environment to allow for the professional exchange of information.
  • Be considerate, respectful and collaborative. Communicate openly with respect for others, critiquing ideas rather than individuals.
  • Avoid personal attacks directed toward other attendees, the local organizers or guests. Be mindful of your surroundings and of your fellow participants.
  • Alert the local organizers if you notice a dangerous situation or someone in distress.

 Unacceptable Behavior

  • Discrimination, harassment or intimidation is unacceptable and will not be tolerated. The local organizers may take any action necessary and deemed appropriate (see below) if attendees engage in unacceptable behavior including removal from the General Assembly without warning or refund.
  • Recording or taking photography of another individual’s presentation without the explicit permission of the local organizers is not allowed.
  • Disruption of talks at oral or poster sessions, any receptions, or at other events organized by the TIGER Symposium in Geodesy 2026 in other venues.

 Reporting Unacceptable Behavior

  • If you are the subject to unacceptable behavior or may have witnessed such behavior that violates professional and respectful participant conduct, please immediately notify the chairperson of the session if the incident has occurred during the meeting or local organizers.
  • Notification can be done by contacting a local organizer on-site (e.g. at the registration desk) or you can e-mail your concern to .
  • All reports will remain confidential.

 Actions to prevent unacceptable behavior

  • If a clear case of verbal discrimination, harassment or intimidation during a scientific session is established to have occurred, the Chairperson should act immediately to stop it. If the situation deteriorates, the Chairperson should ask the offender to leave the room.
  • If any form of harassment occurs in a less openly visible way (e.g. during social activities or informal gatherings), the affected person and/or witness(es) should immediately report it to one of the organizers. The affected person has the option to pursue a formal procedure.
  • In cases described above, the organizer should prepare written notes of the incident, attaching any evidence and identifying any witnesses. The organizer should then give the alleged offender the opportunity to be heard and to respond to the allegation.
  • A full report of the incident should then be sent to the local organizers , who will promptly report to the IUGG Officers any case of harassment that occurred during an IUGG-supported meeting.
  • Harassment incidents or behavior that occur outside IUGG activities referred to above will be considered only when a formal investigation of the case has been conducted by the relevant authority (e.g. the institution, to which the individual is affiliated) and made known to the IUGG Executive Committee. In those cases that involve an IUGG or Association officer, the Executive Committee may decide to take disciplinary actions against that person.

Travel Award

Travel awards for early career scientists from developing countries will be provided via funding from IAG, IASPEI and IACS. Details will follow.

Travel

Gävle (Sweden) is located about 150 km to the north of Stockholm.

Arrival by airplane: The closest airport is Stockholm Arlanda Airport (airport code ARN), which has daily connections to many European and worldwide destinations through scheduled services of a large number of international airlines. It is the largest airport in Sweden. The airport has frequent train connections to Gävle via the station Arlanda C, which is located between the terminals 5 and 4.

Arrival by train: Gävle’s railway station is located very close to the city centre. Timetables and tickets are supplied by SJ.

Arrival by car: Those wishing to drive to Gävle need to enter the Scandinavian peninsula taking either a ferry to Gothenburg, Stockholm or Trelleborg, or using the Øresund Bridge, the connection between Denmark (Copenhagen) and Sweden (Malmö).

Visas: Sweden is a member of the European Union; therefore no visa is needed for E.U. citizens. Non ‐ E.U. participants should contact their nearest Swedish Embassy or Consulate for further information. For a complete list of countries who do need to apply for a visa, check this list of nationals who must be in possession of visas when entering Sweden. If you do need a visa, please visit this webpage to find more details. Those who require a formal invitation for the purpose of obtaining a visa, or raising travel funds in their country, may contact the local organizers via . A paid registration as well as an abstract submission to the meeting is required to receive a formal invitation letter.

Travel insurance: Travel insurance and medical care, when needed, are solely under the responsibility of the participants.

Gävle

Gävle is a city located in Sweden, officially part of Norrland (the northernmost of the three traditional lands of Sweden). Gävle has around 100,000 inhabitants and is the 2nd largest city of Norrland (after Umeå). Gävle is famous for its goat, a goat made of hay raised during Christmas time in Gävle. Unfortunately, you won’t see it during your stay, but you may spot a couple of small colored goats made of stone in the streets. Besides this, a rock in the harbour of Gävle is very famous around sea-level researchers: the Celsius rock.

Travel to Gävle: More information can be found on the “Travel” tab.

Travel within Gävle: Several bus lines are available in Gävle that operate under X-trafik. Tickets can be obtained via the app or on the bus. No cash can be used. Payment is done with credit cards.

Hotels: Several hotels are located in the city centre. A list with codes for the time of the TIGER Symposium in Geodesy will be distributed to those who registered for the meeting.

Conference venue: The meeting will take place at Gävle Konserthus. The venue is in walking distance of the city centre (500 m).

Conference dinner: The conference dinner will take place at Lilla Gasklockan, which is a bit further outside, but still within walking distance (2.3 km). A city bus (line 14) stops in front of the venue of the conference dinner as well as in the city centre.

Tourist information: All information is available online. In addition, you can find so-called InfoPoints througout the city.

Climate & Clothing: Temperatures can be between 0℃ and 20℃. Snow is very unlikely end of September and early October, but rain and wind are more common during the fall season.

Gävle & surrounding

Here are a few suggestions to visit, if you arrive earlier or stay a bit longer in Sweden:

Gävle:
Swedish Railway Museum
Swedish Prison Museum
Norrlandet seaside hiking trail
County Museum of Gävleborg

Near surrounding:
Billuddens nature reserve (close to Skutskär) – xxx
Rönnåsen (close to Ockelbo) – see the former coastline of the Baltic Sea at 270 m altitude

Further away:
Stockholm
Uppsala
Falun
High Coast

Miscellaneous

Q: Do I need a visa for Sweden?
A: Check this list of countries, whose nationals must apply for a visa before entering Sweden.

Q: How do I get a visa for Sweden?
A: Go to this website and check the guidelines on how to apply for a visa. If you need an invitation letter, please send an email to together with your registration confirmation for the TIGER 2026 Symposium in Geodesy.

Q: Where can I print my poster?
A: We recommend printing your poster at your work, but in case you forgot it or lost it on your way to Gävle, here are few suggestions: TBA

Q: Where can I buy groceries?
A. ICA & Coop are in the city centre (close to most hotels), but other stores within a 2 km radius around the city centre are available as well.

Q. What does the power socket look like in Sweden?
A. Type F,C socket, 230V.

Q. Do I need to tip in Sweden?
A. It is not standard practice.

Q. What is the emergency number in Sweden?
A. 112. SMHI provides weather information and warnings.

Q. Can I swim at the beach?
A. Yes, but the water can be cold in October.

Q. Can I see the northern lights (aurora borealis) in Gävle?
A. Yes, it is possible to see the northern lights in Gävle, if sun activity is high. Check the forecast here or here or download an app to your mobile phone (e.g., “My Aurora Forecast”).

Q. I arrive a bit earlier or stay a bit longer in Gävle. What can I do?
A. Please check the “Gävle” tab for additional infos.

Q. How far is it to Onsala Space Observatory?
A. Onsala Space Observatory is close to Gothernburg in southern Sweden, along the west coast. You can reach Kungsbacka (the closest town to Onsala Space Observatory) with the train/bus within 6 hours or in about 7 hours with car. Please let us know (), if you are considering or are interested to visit Onsala Space Observatory during your stay in Sweden.

Any other question or a suggestion for the website? Ask us here.

Contact

Conference Coordination Team: or ask your question here.

Local Organizing Committee

Rebekka Steffen (Lantmäteriet, Sweden)
Holger Steffen (Lantmäteriet, Sweden)
Tobias Nilsson (Lantmäteriet, Sweden)
Per-Anders Olsson (Lantmäteriet, Sweden)
Faramarz Nilfouroushan (Lantmäteriet & University of Gävle, Sweden)

IAG as part of the IUGG

  
The International Association of Geodesy (IAG)  is a constituent association of the International Union of Geodesy and Geophysics (IUGG).

IAG Related Organisations

IAG collaborates closely with numerous organizations within geodesy and beyond. See the list for details.

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