Volcanic Mitigation Systems Revised by Volcanic Risk Assessments and New-generation Hazard Maps Based on GIS Database of Volcanic Disasters

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Based on the GIS database of the population density and other social infrastructures, volcanic risk at Nasu active volcanic area was assessed by the hazard, vulnerability, and potential loss at risk. As many tourist facilities are located within 20km SW of Nasu volcano, the risk values are estimated to be high scores at the volcanic area. Because Japan has a high population density and a high land use, this often develops areas as living spaces, even areas close to the volcanoes. Consequently, the hazard map and risk assessment of the active volcanic areas are urgently needed for effective volcanic disaster management in a medium- and long term perspective.