Achmad, A.R.; Syifa, M.; Park, S.J.; and Lee, C.W., 2019. Geomorphological transition research for affecting the coastal environment due to the volcanic eruption of Anak Krakatau by satellite imagery. In: Jung, H.-S.; Lee, S.; Ryu, J.-H., and Cui, T. (eds.), Advances in Remote Sensing and Geoscience Information Systems of Coastal Environments. Journal of Coastal Research, Special Issue No. 90, pp. 214-220. Coconut Creek (Florida), ISSN 0749-0208.

Volcano eruptions of Anak Krakatau had a great impact on the coastal area at the western part of Java island in Indonesia. In the middle of 2018, the volcanic activity at Anak Krakatau in Indonesia increased. Since June 2018, the eruption begun, accompanied by volcanic earthquakes, emission, and tremor vibration. However, on December 22, 2018, the eruption of Anak Krakatau caused a landslide on the southwest part of the volcano. The landslide also caused a tsunami in coastal area and caused many people to become victims in Banten province. There were significant geomorphological changes at Anak Krakatau Island where the volcano is situated. In this study, we monitored the geomorphological change of the Anak Krakatau Island and calculated the total area of the island for pre-eruption, post-eruption, and recent times. By using SNAP 6.0 program and ArcMap 10.4, Sentinel-1 data were processed to generate maps and calculate the extent of the island. The geomorphological changes were successfully detected and quantified. This kind study using all-weather satellite radar imagery can be used to detect and calculate the total area of any geomorphological change from future volcanic activity.