Youm, M.; Tasliman, M. T.; Lee, S., and Kim, H., 2019. Displacement measuring of coastal area using PS-InSAR. In: Lee, J.L.; Yoon, J.-S.; Cho, W.C.; Muin, M., and Lee, J. (eds.), The 3rd International Water Safety Symposium. Journal of Coastal Research, Special Issue No. 91, pp. 291-295. Coconut Creek (Florida), ISSN 0749-0208Natural disasters not only cause harm to humans, but also cause changes in the shape of the earth surface. A sudden earthquake occurred in Pohang City with a moment magnitude of 5.4 and caused a serious aftermath to human and property and, furthermore, the geological characteristics of Pohang City worsen the damage from earthquake itself. The present study makes an attempt to analyze the ground displacement as the effects of the earthquake by applying PS-InSAR technique in Sentinel-1A images. The advantage of PS-InSAR in terms of time-series analysis makes it easy to generate the trend of land displacement from the Pohang City. The result in this study indicates that the earthquake has caused the displacement in coastal area of Pohang City.