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Purpose: The development of multi-hazard risk assessment frameworks has gained momentum in the recent past. Nevertheless, the common practice with openly available risk data sets, such as the ones derived from the United Nations Office for Disaster Risk Reduction Global Risk Model, has been to assess risk individually for each peril and afterwards aggregate, when possible, the results. Although this approach is sufficient for perils that do not have any interaction between them, for the cases where such interaction exists, and losses can be assumed to occur simultaneously, there may be underestimation of losses. The paper aims to discuss these issues. Design/methodology/approach: This paper summarizes a methodology to integrate simultaneous losses caused by earthquakes and tsunamis, with a peril-agnostic approach that can be expanded to other hazards. The methodology is applied in two relevant locations in Latin America, Acapulco (Mexico) and Callao (Peru), considering in each case building by building exposure databases with portfolios of different characteristics, where the results obtained with the proposed approach are compared against those obtained after the direct aggregation of individual losses. Findings: The fully probabilistic risk assessment framework used herein is the same of the global risk model but applied at a much higher resolution level of the hazard and exposure data sets, showing its scalability characteristics and the opportunities to refine certain inputs to move forward into decision-making activities related to disaster risk management and reduction. Originality/value: This paper applies for the first time the proposed methodology in a high-resolution multi-hazard risk assessment for earthquake and tsunami in two major coastal cities in Latin America. [ABSTRACT FROM AUTHOR]

This paper proposes an earthquake-event-based method for the construction of regional flood hazard maps for tsunami. The method involves five steps. The first is to characterise the seismic hazard as a set of collectively exhaustive and mutually exclusive stochastic events that fully describes the spatial distribution and annual frequency of occurrence in accordance with the location of an earthquake, its depth and magnitude. The second is to compute the vertical sea-floor deformation produced by each one of the earthquakes, after which the propagation of tsunami and the inundation depth produced by each earthquake is calculated. Step four is to present the earthquake-induced tsunami hazard considering only those events that could generate a tsunami as a set of stochastic events that describes the spatial distribution of each tsunami. The final step is to obtain, for any point of interest, the tsunami inundation depth exceedance rate, taking into account the contribution of all tsunamis computed in step four. The method is applied to obtain maps of tsunami hazard for the Mexican Pacific coast for return periods of 150 and 500 years. [ABSTRACT FROM AUTHOR]