The Canterbury Earthquake sequence 2010-2011 in New Zealand highlighted the need for decision support tools to inform and support, among others, decisions on: 1) damage assessment, recovery and resilience enhancement of impacted infrastructures; 2) the management of post-earthquake housing in the short and long-term; 3) the reconstruction planning at the urban-level. First, the paper reports and analyses the aforementioned requirements, based on the perspectives of the stakeholders and key agencies involved in the same decision making processes. Secondly, the paper presents the idea of an open source solution for consequence based decision- aking tools to be developed by, and to be made available worldwide to stakeholders involved in natural hazard risk mitigation and management processes. To reach this goal, the “Multi-Hazard Assessment, Response, and Planning” (M-HARP) global, open source consortium was established with members from multiple countries. The activities of the M- HARP Consortium, summarized in the paper, include: 1) the further development of existing open-source modelling tools (e.g. MAEviz, EQvis) along with the necessary IT framework and infrastructure to support them; 2) the development of additional applications and modules to address specific aspects of risk assessment and mitigation, post-disaster response and recovery for multiple-hazards; 3) desired strategic partnership and collaboration with other, appropriate initiatives worldwide (e.g. Global Earthquake Model, GEM, RiskScape).
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