Abstract
Periodic generated, sequence of earthquakes with magnitude 7.5 at a depth of 10 km occurred in Palu Koro fault, Central Sulawesi, and was trigger tsunamis wave in Talise beach reach coastline in few minutes. It causes entire coastline become extremely attacked and moves gravitationally of the ground at a slope as well, known as flow of liquefaction. Reconsolidation of coastline structure in post-liquefaction event in Palu’s Talise beach had been heaving due to devastating aftermath of the earthquake and tsunami that hit Sulawesi. Lack and rough terrain are intensively associated with the difficult to assess post-area, so remote sensing can be efficiently and quickly to identify potential post-area occurrence. Satellite multispectral such as Sentinel, and SRTM DEM applied with a new approach to corporate post-event liquefaction in Talise beach, Central Sulawesi, Indonesia. In this result, we depict the 3D surface topography of pre and post event to analyse the liquefaction impact. We found the differentiation approach of pre and post event imply the liquefaction in variation of dimensional ratio. Therefore, our hypothesis may be useful to the preliminary research for mitigation and revitalization in post-area.
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