Liquefaction hazard map in Korean disaster monitoring system

The Korean government recently has been focusing to minimize natural disaster damages including earthquake damage under the slogan ‘ Safe Korea’. A part of this effort is to set up Korean earthquake defense GIS system including several earthquake hazards such as liquefaction and land sliding. The purpose of this study is to make micro and macro liquefaction hazard maps in Korea based on liquefaction potential index calculated by simplified liquefaction potential assessment. The difference between micro and macro maps is consideration on the seismic amplification in soils. In case of micro liquefaction hazard map, it has been used to perform site response analysis. In other case of macro liquefaction hazard map for the whole country, soil amplification factor can replace the site response analysis because we must perform so many site response analyses to calculate LPIs. Accordingly, we verified the application of the soil amplification factor. At that time, S city was considered in its feasibility by the target. In this study, we developed a specific program to calculate LPI automatically. Finally, macro liquefaction hazard maps under various accelerations for the whole country could be drawn.