A Preliminary Application of HAZUS for Loss Estimation in the Korean Peninsula
김광희; 강수영; 유해수; 석봉출
The Korean peninsula has been considered a part of the stable Eurasia continent. Located between the active Japan and Ryukyu subduction zones and the northern China plate, a typical example of intraplate seismicity can be found in the peninsula. Although the Korean peninsula has not experienced any disastrous earthquake during the modern seismic monitoring period since the first installation of the modern seismometer in 1905, study results from historic records have presented otherwise. In spite of the discrepancies in the magnitude estimation of historic events, there are consensus among researchers that the Korean peninsula has experienced multiple strong shakings during its history. A magnitude 4.8 Odaesan earthquake in January 2007 jolted the nation and reminded potential seismic risk. Growing number of critical facilities constructed during the last few decades has increased the needs for the seismic risk assessment throughout the peninsula. In order to meet the demands, we performed a pilot test to examine the efficiency and limitation of HAZUS-MH, a GIS based loss estimation system. The system has been developed by US FEMA and NIBS and made available to the government and the public. In the pilot test, Gyeongsang-do has been selected for the test after careful reviews of previous studies including historical and modern seismicity in the peninsula. A ShakeMap for the selected scenario earthquake with magnitude 6.7 in Gyeongju area is prepared. Then, any losses due to the scenario event have been estimated using HAZUS. Results of the pilot test show the study area may experience significant physical, economic, and social losses due to the proposed scenario earthquake. Approximately 43% of essential facilities in Gyeongju and Pohang are expected to experience difficulties in operation after the earthquake. Detailed study in the future will provide efficient and crucial information to the decision makers and emergency workers to mitigate natural hazards.