In May 2009, the UNISDR system published the 2009 Global Assessment Report on Disaster Risk Reduction 2009). One component of this report consisted of a global analysis. This task was performed by several institutions who efforts over two years to achieve a global modelling hazards, including new hazard models for floods, tropical cyclones, landslides, drought and tsunamis as well as a reinterpretation of the earthquake hazard model. It allowed for the computation of human and economic exposure. A totally new methodology was used to calibrate vulnerability using a so-called event-per-event analysis. This made it possible determine the socio-economical and contextual parameters that are associated with human and economic vulnerability. This new methodology considers the intensity of each event as well as contextual parameters in order to compute the risk for different natural hazards. Risk maps were generated at a resolution of 1 by 1 km and then aggregated at 5 by 5 km for four natural hazards (i.e. floods, earthquakes, landslides and tropical cyclones). The methodology also allowed for the computation of an index for comparing the risk level of different countries. Trends in risk were also studied.