#TITLE_ALTERNATIVE#

• Main Author: OLIVIA TRIANAPUTRI (NIM: 15110066), MILA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/20284
• Institution: Institut Teknologi Bandung

Ring of Fire is the name given to Indonesia because of the volcanoes chains passing through its region. Lies within tectonoactive zone, Indonesia is expected to have information and knowledge on volcanoism, including the disaster risk that might occur. Sinabung volcano and Sibayak volcano are located in Karo, North Sumatra. Mount Sinabung is an example of Indonesia volcano that its volcanic activity continued to increase since the year of 2010. This study aimed to obtain a topographical changes graphic that occur in the summit of Mount Sinabung and Sibayak, as well as knowing the starting time of the topographical changes that would indicate the presence of precursor behaviors before an eruption. Remote sensing technology makes the whole topography observation process faster and also cuts down the cost of geological survey. <br /> <br /> <br /> <br /> <br /> This method is performed by extracting the backscattering intensity values recorded in each pixel of the SAR image at Mount Sinabung and Sibayak, then calculating the value of normalized radar cross-section. Henceforth, the result is validated using secondary data in form of Landsat 8 imagery, ratio imagery, and radial component of a tilt-meter. These processes ministrant to assemble as much information about topographical change within the area. The validation process results in a comprehensive information that relates topographical change with precursor behavior of Mount Sinabung. Furthermore, image ratio is produced, as the ratio between pre-eruption imagery and post-eruption imagery, to identify the direction of volcanic product delineation at Mount Sinabung. As a final result, this study defines a relationship between topographic changes with precursor behavior at Mount Sinabung.