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This paper describes the results achieved within the framework of the national research project Reduction of the Seismic Vulnerability of Infrastructural Systems and Physical Environment, sponsored by the GNDT (Italian National Group for Defense Against Earthquakes), which is a body of the INGV (Italian Geophysic and Volcanology National Institute). The project, which involved several Universities around Italy under the coordination of Prof. Michele Calvi of the University of Pavia, was carried out over three years and has been just completed in July 2004. The aim of the project was to study the problems related to the seismic vulnerability assessment both of the physical environment and the infrastructural systems, to develop new techniques and tools, or improve the existing ones, to provide an efficient reduction of the risk. One of the products of the project is the Web GIS, described in this paper, which has been applied to a test area in the South of Italy which in the past has suffered high seismic level events, to prove its efficiency and to examine the possibility of its implementation at national level. [ABSTRACT FROM AUTHOR]

In Turkey, mitigation works have been given more importance since the 1999 Gulf earthquake. The first drafted projects put forth for Istanbul are the seismic microzonation and earthquake risk assessment projects. However, the fundamental plan which provided a ground for thorough assessment deducted from the mentioned projects as well as a road-map for mitigation is the Earthquake Master Plan. YTU (Yildiz Technical University) settlement and urban planning team have been faced some difficulties for risk assessment and priorities, during the IEMP (Istanbul Earthquake Master Plan) project. Therefore, some processes related to spatial decisions such as definition of priority areas were applied just for highly macro level. Risk priority areas could not be determined due to the lack of necessary information. The team has developed a new zoning approach for risk zoning based on density, pattern and other properties according to the requirements of previous projects with the contribution of BU (Boğaziçi University) project team. In this paper, existing GIS contents of risk maps and other information as the most essential component of the mitigation phase of disaster management, new zoning approach developed by YTU-BU teams during the IEMP project and possible results are presented. [ABSTRACT FROM AUTHOR]