University of Tabriz Journal of Geography and Planning 2008-8078 17 43 2013 05 22 Analysis of Earthquake Deleterious Factors in Tehran’s District 1 Using GIS Analysis of Earthquake Deleterious Factors in Tehran’s District 1 Using GIS 93 122 7 FA Ali Shamai Khwarizmi Tehran University, author Najmeh Heidarzadeh Geography and Urban Planning of Kharazmy tehran university Babak Lotfi Moghadam Geography and Urban Planning of Kharazmi tehran university Journal Article 2011 10 26 Iran is one of the earthquake-prone countries in the world. Almost 90% of Iran is located in an earthquake belt. Based on seismic zoning maps, Tehran metropolitan area is highly dangerous and unsafe. Tehran’s district 1 is situated in one of the main Tehran's faults called North Tehran fault. Since recognizing the deleterious factors plays an important role in reducing earthquake dangers, so analysis of these factors can have a significant role in controlling the harmful factors and reducing death toll and financial losses.  The main goal of this study is to identify the most important predisposing factors which result from earthquakes in Tehran's district 1, also to distinguish target areas according to their level of vulnerability as high, moderate and low is another aim of this paper. Data and information collected in this study are spatial, statistical and descriptive. The method of research is descriptive-analytic. In this paper, also the geographical information systems (GIS) have been used. The results indicate that the most important predisposing factors in the region are by an order of preference: the distance from the fault, the slope of the land, proximity of incompatibilities with applications, the building's life, population density, lack of access to open spaces and urban areas are parts. The most vulnerable regions of this area are 8-6-10-4 respectively. Iran is one of the earthquake-prone countries in the world. Almost 90% of Iran is located in an earthquake belt. Based on seismic zoning maps, Tehran metropolitan area is highly dangerous and unsafe. Tehran’s district 1 is situated in one of the main Tehran's faults called North Tehran fault. Since recognizing the deleterious factors plays an important role in reducing earthquake dangers, so analysis of these factors can have a significant role in controlling the harmful factors and reducing death toll and financial losses.  The main goal of this study is to identify the most important predisposing factors which result from earthquakes in Tehran's district 1, also to distinguish target areas according to their level of vulnerability as high, moderate and low is another aim of this paper. Data and information collected in this study are spatial, statistical and descriptive. The method of research is descriptive-analytic. In this paper, also the geographical information systems (GIS) have been used. The results indicate that the most important predisposing factors in the region are by an order of preference: the distance from the fault, the slope of the land, proximity of incompatibilities with applications, the building's life, population density, lack of access to open spaces and urban areas are parts. The most vulnerable regions of this area are 8-6-10-4 respectively. https://geoplanning.tabrizu.ac.ir/article_7_6a6f6112fa180f2c0126f6630d36f67d.pdf