THE INVESTIGATION OF DEFORMATION SCHEME AFTER THE 2018 SITUBONDO EARTHQUAKE BASED ON GPS DATA FOR 2018 - 2020

• Main Author: Setyo Wibiseno, Pandu
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/66900
• Institution: Institut Teknologi Bandung

Indonesia is located in an active tectonic zone which is associated with plate boundaries associated with megathrust and active faults so that it has a high level of seismicity. This causes a high potential for earthquake disasters in Indonesia. Earthquake research in Indonesia has often been carried out. However, one of the recent devastating earthquakes, that is the 2018 Situbondo earthquake with a magnitude of M6.2 has not been well studied. This study investigates the pattern of deformastion that occurred after the 2018 Stitubondo earthquake. The data used in this research comes from seven Global Positioning System (GPS) measurement stations installed and recorded by the Geospatial Information Agency (BIG). The data processing carried out includes the data preparation stage followed by the main processing to achieve the objectives of this study. The result of the main processing is a velocity vector obtained from linear and viscoelastic modeling. These two results are used to determine the deformation scheme of the Situbondo region and its surroundings. The results show that the deformation pattern of Situbondo and its surroundings is dominated by afterslip and megathrust coupling effects from the subduction zone in the south of Java Island.