This project aims to develop a major international effort to create a Global Volcano Model (GVM) that provides systematic evidence, data and analysis of volcanic hazards and risk. The GVM project addresses hazards and risks on global, regional and local scales, and develops the capability to anticipate future volcanism and its consequences. The project builds on initiatives over the last several years to establish a global database of volcanic hazards (VOGRIPA) and to develop analysis and modelling tools to assess volcanic hazard and risk. The proposed GVM project also complements and interfaces with other major international initiatives, notably including the Global Volcanism Progamme of the Smithsonian Institution, WOVOdat (a database on precursors to volcanic eruptions), VHub (a US-led effort to develop an online collaborative environment for volcanology research and risk mitigation, including the development of more effective volcanic hazards models), the Volcano Observatory Best Practices Programme and the International Volcanic Health Hazards Network. The GVM project has parallels with the Global Earthquake Model in intention and scope of providing an authoritative source for assessing volcanic hazard and risk. There is a strong international consensus that GVM is an essential and timely undertaking. This project, which is within the natural hazards theme of NERC's strategy, provides a unique opportunity for the UK to play a leading role in a major international effort to address volcanic hazard and risk. There are 50 or so volcanic eruptions a year worldwide with approximately 20 ongoing at any one time. Increased global volcanic risk derives from factors that are increasing exposure and vulnerability, such as population growth, environmental degradation, urbanization, inequality and increasing independencies in a globalised world. There is also a decrease in societal resilience arising from the way society is organized and the increasing complexities of systems required to respond to emergencies, especially where impacts extend beyond national boundaries. The GVM project will develop an integrated global database system on volcanic hazards, vulnerability and exposure, make this globally accessible and crucially involve the international volcanological community and users in a partnership to design, develop, analyse and maintain the database system. The main hazards include: explosive eruptions, pyroclastic flows, lava domes, lava flows, lahars, tephra fall and ash dispersal, gas, flank collapse, debris flows and health hazards. New reliability indices and measures of uncertainty will be essential elements of the GVM. The GVM project will aim to establish new international metadata standards that will reduce ambiguity in the use of global volcanic datasets. Vulnerability and exposure data will be integrated into the GVM and again new methods of assessment and analysis will be investigated and tested. The integrated database system will be made available via an interactive web system with search engines using both spatial and text-based commands. The downloadable products (including maps, tables and text) and web system will be developed with end-users. Addition of data by users will be facilitated via an upload facility. New data or corrections will be validated by an editor before being incorporated. The project also intends to establish methodologies for analysis of the evidence and data to inform risk assessment, to develop complementary volcanic hazards models, and create relevant hazards and risk assessment tools. Only a very broad international interdisciplinary partnership that is closely aligned to the needs of users of research can meet all these ambitious objectives. The research will provide the scientific basis for mitigation strategies, responses to ash in the atmosphere for the aviation industry, land-use planning, evacuation plans and management of volcanic emergencies.