Deformation Analysis Due To The Cianjur Earthquake On November 21, 2022 Using The Differential Interferometric Synthetic Aperture Radar Technique

Ghifari, Abdurrahman Aushof Bahy (2023) Deformation Analysis Due To The Cianjur Earthquake On November 21, 2022 Using The Differential Interferometric Synthetic Aperture Radar Technique. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sekumpulan gempa bumi mengguncang Kabupaten Cianjur dan sekitarnya dengan salah satunya adalah gempa berkekuatan besar M5.6 yang terjadi pada tanggal 21 November 2022, pukul 13:21:10 WIB. Setelah serangkaian gempa yang melanda Kabupaten Cianjur dan sekitarnya, terjadi perubahan bentuk, posisi, orientasi, dan bentuk yang disebut deformasi. Salah satu teknik geodetik yang digunakan untuk memantau deformasi adalah teknik Differential Interferometric Synthetic Aperture Radar (DInSAR). Teknik penginderaan jauh aktif ini membutuhkan dua atau lebih citra pada waktu yang berbeda tetapi di lokasi yang sama untuk menghasilkan interferogram. Penelitian ini menggunakan teknik DInSAR dengan metode two-pass interferometry, serta citra satelit Sentinel-1A dalam ascending dan descending. Dalam penelitian ini, hasil validasi dibandingkan antara hasil deformasi yang diperoleh dari teknik DInSAR dan hasil deformasi yang diperoleh dari Global Navigation Satellite System Continuous Operating Reference System (GNSS CORS). Dalam perbandingan hasil validasi, dilakukan uji statistik dengan menggunakan Root Mean Square Error (RMSE). Nilai deformasi berdasarkan Line-of-Sight (LOS) memiliki rentang -0.148 hingga 0.051meter untuk citra dengan arah Ascending, sementara untuk citra dengan arah Descending memiliki rentang deformasi -0.059 hingga 0.081 meter. Hasil RMSE antara LOS GNSS dan LOS DInSAR ascending adalah 0.0523 meter. Sementara itu, hasil RMSE antara LOS GNSS dan LOS DInSAR descending adalah 0.0117 meter. Selain itu, nilai koefisien korelasi untuk LOS DInSAR ascending dengan LOS GNSS adalah 0.55961 atau memiliki korelasi sedang, dan untuk LOS DInSAR descending dengan LOS GNSS adalah 0.73482 atau memiliki korelasi kuat.
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A series of earthquakes struck the Cianjur Regency and its surroundings with one of the large magnitude is M5.6 which occurred on November 21, 2022, at 13:21:10 WIB. After a series of earthquakes that hit the Cianjur Regency and its surroundings, there was a change in shape, position, orientation, and shape called deformation. One of the geodetic techniques used to monitor deformation is the Differential Interferometric Synthetic Aperture Radar (DInSAR) technique. This active remote sensing technique requires two or more images at different times but at the exact location to produce an interferogram. This study employed the DInSAR technique with the two-pass interferometry method, as well as Sentinel-1A satellite imagery in ascending and descending orbits. In this research, validation results were compared between the deformation results obtained from the DInSAR technique and the deformation results obtained from the Global Navigation Satellite System Continuous Operating Reference System (GNSS CORS). In a comparison of validation results, a statistical test with the Root Mean Square Root is carried out. The deformation value based on Line-of Sight has a range of -0.161 to 0.051 meters for ascending images while for descending images it has a deformation range of -0.059 to 0.081 meters. The result of Root Mean Square between LOS GNSS and LOS DInSAR ascending is 0.0523 meters. Meanwhile, the RMSE result obtained between LOS GNSS and LOS DInSAR ascending is 0.0117 meters. Meanwhile, the correlation coefficient value for LOS DInSAR Ascending with LOS GNSS is 0.55961 or has moderate correlation and for LOS DInSAR Descending with LOS GNSS is 0.73482 or has a strong correlation.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Gempa bumi Cianjur 2022, Deformasi, Differential Interferometric Synthetic Radar, Sentinel-1, GNSS CORS, Cianjur Earthquake 2022, Deformation
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
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	Abdurrahman Aushof Bahy Ghifari
Date Deposited:	01 Aug 2023 07:13
Last Modified:	21 Dec 2023 07:17
URI:	http://repository.its.ac.id/id/eprint/100151

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