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| Global Seismic Hazard Assessment Program | |
|---|---|
| Name | Global Seismic Hazard Assessment Program |
| Abbreviation | GSHAP |
| Formation | 1992 |
| Type | International scientific collaboration |
| Headquarters | Geneva |
| Region served | Global |
Global Seismic Hazard Assessment Program is an international initiative that compiled uniform seismic hazard maps and data to support risk reduction, engineering, and disaster preparedness. It coordinated scientific expertise from national agencies, research institutes, and intergovernmental organizations to produce probabilistic seismic hazard assessments and maps for use by policymakers and infrastructure planners. The program's outputs informed seismic building codes, urban planning, and emergency management across diverse tectonic settings.
The program integrated contributions from agencies such as United Nations Educational, Scientific and Cultural Organization, World Bank, European Commission, United Nations Development Programme and scientific bodies including International Union of Geodesy and Geophysics, International Seismological Centre, European Seismological Commission and national institutions like United States Geological Survey, Geological Survey of Canada, Instituto Geográfico Nacional (Spain), Istituto Nazionale di Geofisica e Vulcanologia, Japan Meteorological Agency and China Earthquake Administration. Its core deliverables were probabilistic seismic hazard maps, regional models, and a standardized database combining historical and instrumental seismicity, paleoseismology, and fault data. Collaborations included universities and observatories such as Massachusetts Institute of Technology, ETH Zurich, Imperial College London, California Institute of Technology, Paris Observatory and Columbia University.
Initiated in the early 1990s, the program built on prior efforts like the International Seismological Centre archives and regional mapping projects such as the European Seismic Hazard Map and national initiatives by USGS Seismology Program and Geoscience Australia. Key milestones included the 1992 launch, the publication of global and continental hazard maps in the mid-1990s, and integration with later projects such as the Global Earthquake Model and continental-scale reassessments by Seismological Society of America-affiliated research groups. Major contributors included experts affiliated with University of Tokyo, National Autonomous University of Mexico, Australian National University, Université de Genève and Russian Academy of Sciences. Workshops and conferences convened participants from United Nations, World Health Organization, International Red Cross and Red Crescent Movement and regional bodies like ASEAN and African Union to translate technical outputs into policy.
The program applied probabilistic seismic hazard assessment (PSHA) frameworks similar to methods developed at Harvard University, Columbia University, Princeton University and Stanford University. Input datasets combined seismic catalogs from International Seismological Centre, paleoseismic records from specialists at University of California, Berkeley and fault databases curated by institutions like British Geological Survey and Geological Survey of India. Ground motion prediction equations (GMPEs) used in analyses included models advanced by researchers at Lawrence Livermore National Laboratory, Pacific Northwest National Laboratory, Los Alamos National Laboratory and European research centers such as GFZ German Research Centre for Geosciences. Computational implementations employed software developed in collaboration with groups at CNR (Italy), EOST Strasbourg and National Center for Atmospheric Research.
Governance involved steering committees with representatives from UNESCO, World Bank, International Union of Geodesy and Geophysics and national agencies like USGS, Geological Survey of Canada, Geoscience Australia, Instituto Geofísico del Perú and National Research Council (Italy). Scientific working groups drew members from universities and research institutes including University of California, San Diego, Seismological Society of Japan, ETH Zurich, University of Cambridge, Barcelona Supercomputing Center and National Taiwan University. Regional nodes coordinated contributions from entities such as Pan-American Health Organization, European Commission's Joint Research Centre, African Seismological Commission and Asian Disaster Reduction Center.
Outputs comprised continental and global hazard maps covering regions like Europe, Africa, Asia, North America, South America, Oceania and the Antarctica periphery. Notable regional products included maps for the Mediterranean, the Andes, the Himalayas, the Alps, the Caucasus and the Pacific Ring of Fire. The program's datasets informed subsequent assessments by entities such as Global Earthquake Model, European Seismological Commission projects, national seismic hazard revisions by USGS, Geological Survey of India, Japan Meteorological Agency and initiatives led by Inter-American Development Bank for infrastructure resilience.
GSHAP outputs were used to update seismic provisions in model building codes influenced by organizations like International Organization for Standardization, European Committee for Standardization, American Society of Civil Engineers and national standards bodies. Infrastructure projects financed by World Bank, Asian Development Bank and European Investment Bank used hazard inputs derived from the program. Academic citations and follow-up research appeared in journals associated with American Geophysical Union, Seismological Society of America, Nature, Science and regional publications from Springer Nature and Elsevier-affiliated titles. The program also supported capacity building through training linked to United Nations Office for Disaster Risk Reduction, UNESCO chairs, and university curricula at institutions like University of Chile and National Autonomous University of Mexico.
Critiques focused on data sparsity in parts of Africa, Central Asia, Greenland and some island regions, dependence on limited historical catalogs such as those curated by International Seismological Centre and challenges reconciling diverse GMPEs from research groups at Berkeley Seismological Laboratory, UC Berkeley, Caltech and ETH Zurich. Methodological debates involved trade-offs debated at conferences hosted by Seismological Society of America, International Association of Seismology and Physics of the Earth's Interior and European Geosciences Union concerning epistemic uncertainty, model selection, and integration of paleoseismology from specialists at Cornell University and University of Oxford. Policy users such as World Bank and national ministries sometimes found probabilistic outputs difficult to translate directly into prescriptive codes without further regional studies by organizations like USGS and Japan Meteorological Agency.