Spatial-temporal evolution analysis of terrorist attacks in Pakistan from 2001 to 2020
In order to reveal the spatial-temporal evolution of terrorist attacks in Pakistan from 2001 to 2020,based on the data collected in the Global Terrorism Database,geostatistical meth-ods such as kernel density,standard deviation ellipse and spatial autocorrelation were used for analysis and research.The results show that the situation of terrorism in Pakistan has experi-enced three stages from 2001 to 2020.The turning point of the stage is highly consistent with the alternation of political power.The spatial distribution changed from"triangle"to"N-shaped",forming three major terrorist attack clusters with Karachi,Peshawar and Quetta as the core.The density value of casualties decreased significantly,but the scope of terrorist attacks in-creased,and the density value of terrorist attacks in Karachi and Quetta did not decrease signifi-cantly.In different stages,the spatial autocorrelation of terrorist attack events showed differenti-ation.The clustering characteristics of the original FATA and Quetta clusters were mainly H-H characteristics,while the Karachi cluster was H-L characteristics.Terrorist attacks using explo-sives are the most frequent,and in recent years attacks on the military,police and journalists and media have increased.The evolution of terrorist attacks in Pakistan is driven by identity factors,political factors,social and economic factors,geographical location factors and other factors,and used by religious extremism and ethnic separatist forces,the scope of terrorist attacks has been expanded in Pakistan,with the central city becoming major targetted area,causing worse impact.