Analisis Deformasi Gempa Bumi yang Terjadi di Kabupaten Garut Tanggal 27 April 2024 dengan Metode Dinsar dan Validasi GPS

Mufidah, Aida Nur (2025) Analisis Deformasi Gempa Bumi yang Terjadi di Kabupaten Garut Tanggal 27 April 2024 dengan Metode Dinsar dan Validasi GPS. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kabupaten Garut merupakan wilayah dengan tingkat kerentanan tinggi terhadap gempa bumi karena lokasinya yang dekat dengan zona subduksi aktif, seperti megathrust dan intraslab. Gempa bumi berkekuatan 6,2 SR yang terjadi pada 27 April 2024 dengan pusat di 156 km barat daya Garut memicu deformasi pada permukaan bumi di sekitarnya. Penelitian ini bertujuan untuk menganalisis deformasi akibat gempa dengan metode Differential Interferometric Synthetic Aperture Radar (DInSAR) dan memvalidasinya menggunakan data Global Positioning System (GPS). Citra Sentinel-1A digunakan untuk menghasilkan peta deformasi dalam arah Line of Sight (LOS), yang kemudian dibandingkan dengan data dari delapan stasiun GPS. Hasil menunjukkan deformasi berkisar antara -27,23 cm hingga +5,53 cm dengan pola subsidence dan uplift yang tersebar menyeluruh di sekitar area studi. Korelasi antara metode DInSAR dan GPS menunjukkan nilai r = 0,565, mengindikasikan hubungan cukup kuat. Perbedaan nilai deformasi dipengaruhi oleh kondisi geologi, topografi, tutupan lahan, serta gangguan atmosferik. Validasi dengan GPS memperkuat interpretasi hasil DInSAR sebagai alat pemantauan deformasi spasial secara efisien dan akurat pascagempa.
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Garut Regency is an area with a high level of vulnerability to earthquakes due to its location close to active subduction zones, such as megathrust and intraslab. The 6.2 magnitude earthquake that occurred on April 27, 2024 with the epicenter at 156 km southwest of Garut triggered deformation on the surrounding earth surface. This study aims to analyze earthquake-induced deformation using the Differential Interferometric Synthetic Aperture Radar (DInSAR) method and validate it using Global Positioning System (GPS) data. Sentinel-1A imagery was used to generate deformation maps in the Line of Sight (LOS) direction, which were then compared with data from eight GPS stations. The results show that the deformation ranges from -27.23 cm to +5.53 cm with subsidence and uplift patterns that are thoroughly distributed around the study area. The correlation between DInSAR and GPS methods showed a value of r = 0.565, indicating a moderately strong relationship. Differences in deformation values are influenced by geological conditions, topography, land cover, and atmospheric disturbances. Validation with GPS strengthens the interpretation of DInSAR results as an efficient and accurate tool for monitoring spatial deformation after an earthquake.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Deformasi, DInSAR, Garut, Gempa Bumi, GPS. Deformation, DInSAR, Earthquake, Garut, GPS.
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G109.5 Global Positioning System G Geography. Anthropology. Recreation > G Geography (General) > G70.5.I4 Remote sensing G Geography. Anthropology. Recreation > GB Physical geography > GB651 Subsidences (Earth movements) H Social Sciences > HA Statistics > HA30.6 Spatial analysis T Technology > T Technology (General) > T385 Visualization--Technique T Technology > T Technology (General) > T57.5 Data Processing
Divisions:	Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	Aida Nur Mufidah
Date Deposited:	25 Jul 2025 01:58
Last Modified:	25 Jul 2025 01:58
URI:	http://repository.its.ac.id/id/eprint/121339

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