The GTM informal consortium is constituted by the organizations who have signed a Letter of Interest (LoI), where they declared to share GTM's vision and goals and appointed their own institutional liaisons. The LoIs represent the will of joining the group's effort in formalizing the GTM organization, with a statutory Terms of Reference (ToR) to be developed, and does not imply any material commitment. This effort will define the GTM structure and governance.

Signatory Institutions are listed below (in alphabetical order):

Centro de Investigación para la Gestión Integrada de Desastres Naturales - CIGIDEN Chile  
College of Civil Engineering and Architecture - CCEA - Zhejiang University China  
Evaluación de Riesgos Naturales - ERN Mexico  
Fraser Disaster Risk Consulting Ltd. UK  
French Alternative Energies and Atomic Energy Commission - CEA France
Geological Survey of Israel - GSI Israel  
Geophysical Institute Karlsruher Institut für Technologie -GPI-KIT Germany  
Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum - GFZ  Germany  
Indian Institute of Technology Hyderabad - IITH  India  
Institute of Education, Research and Regional Cooperation for Crisis Management Shikoku - IECMS Japan  
Institute of Geological and Nuclear Sciences Limited - GNS Science  New Zealand  
Institut Français de Recherche pour l'Exploitation de la Mer - Ifremer France  
Instituto de Hidráulica Ambiental de la Universidad de Cantabria - IH Cantabria Spain  
Instituto Português do Mar e da Atmosfera - IPMA Portugal  
International Center for Numerical Methods in Engineering - CIMNE Spain  
International Research Institute of Disaster Science - IRIDeS Japan  
Istituto Nazionale di Geofisica e Vulcanologia - INGV Italy  
KANDiLLi Observatory and Earthquake Research Institute - KOERI Turkey  
Laboratoire Magmas et Volcans -LMV France  
Marine Systems Institute at Tallinn University of Technology - MSI Estonia  
National Research Institute for Earth Science and Disaster Resilience - NIED Japan


National Institute for Research and Development of Earth Physics - NIEP Romania  
National Observatory of Athens - NOA Greece  
NED University of Engineering and Technology - NEDUET Pakistan  
Orta Dogu Teknik Universitesi - METU Turkey  
Stiftelsen Norges Geotekniske Institutt - NGI Norway  
Tsunami Research Center at the University of Southern California - TRC at USC USA  
United States Geological Survey - USGS USA  
Universidad de Málaga - UMA Spain  
Università di Bologna - UNIBO Italy  
Universitat de Barcelona - UB Spain  
Universität Hamburg - UH Germany  
Universitetet i Bergen - UiB Norway  
University College Dublin Earth Institute - UCD EI Ireland  
University College London Institute for Risk and Disaster Reduction - UCL IRDR UK  
University of New South Wales - UNSW Australia