Deformation Monitoring Using Time-Series InSAR in Earthquake Prone Regions (Case Study: Sukabumi, Cianjur, Bandung, and Garut Regency)
Salsabila Khairunnisa
eko YH
Noorlaila Hayati
Putra Maulida
akbar kurniawan
Abstract
The Earth is a dynamic planet whose surface continues to change due to various geological processes that have been occurring for billions of years. When plates in the Earth’s crust move, elastic energy accumulates at the plate boundary zone until it reaches a point where the rock material can no longer withstand the stress. This is when deformation occurs, resulting in fault movement or faults that trigger earthquakes. The sudden movement of rock layers within the earth generates energy that can be emitted in all directions in the form of seismic waves. A deep understanding of the deformation in Indonesia is crucial in improving the preparedness of the community and government for earthquake disasters. The identification of the deformation caused by earthquakes is very important because it provides information about the movement and pressure within the earth’s crust that can trigger earthquakes. This research will use SAR satellite image data processing with the Time Series InSAR method for deformation monitoring, which will be validated through terrestrial observations using the Global Positioning System (GPS) to provide absolute displacement values and determine the difference in deformation monitoring between the results of the Time Series InSAR method and GPS measurements. Based on the data processing that has been carried out, a mean velocity of 5.2 mm/year was obtained based on time series processing for the West Java region. Meanwhile, based on the GPS processing results, a mean velocity of 19.370 mm/year was obtained using 21 GPS stations spread across West Java.
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