Identifikasi Segmen Waru Pada Sesar Kendeng Di Provinsi Jawa Timur Menggunakan Metode Gravitasi

Firmansyah, Sutan Herlambang (2025) Identifikasi Segmen Waru Pada Sesar Kendeng Di Provinsi Jawa Timur Menggunakan Metode Gravitasi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Metode gravitasi digunakan untuk mendeteksi perbedaan densitas batuan bawah permukaan serta membantu mengidentifikasi keberadaan sesar yang tersembunyi. Identifikasi Sesar Kendeng, khususnya segmen Waru penting dilakukan karena wilayah ini tergolong aktif secara tektonik dan memiliki potensi bencana yang tinggi. Untuk mendukung proses identifikasi tersebut, dilakukan analisis lanjutan terhadap data anomali Bouguer menggunakan beberapa pendekatan turunan (derivative). Anomali Bouger dianalisis menggunakan pendekatan First Horizontal Derivative (FHD), First Vertical Derivative (FVD), Total Horizontal Derivative (THD), Second Vertical Derivative (SVD), dan Analytic Signal (AS) yang bertujuan untuk mendeteksi posisi sesar aktif di Wilayah Jawa Timur. Hasilnya analisis ini ialah anomali dengan densitas bernilai tinggi dan berkorelasi dengan keberadaan struktur di daerah penelitian. Data anomali Bouguer dimodelkan untuk menunjukkan sebaran densitas dua dimensi (2D) di bawah permukaan. Hasil pemodelan pada tiga sayatan digunakan untuk menjustifikasi hasil analisis FHD, FVD, THD, SVD, dan AS, yang mengindikasikan keberadaan Sesar Kendeng di Jawa Timur. Sesar ini diklasifikasikan sebagai sesar naik dan berpotensi menyebabkan gempa bumi. Penelitian ini memiliki arti penting untuk perencanaan mitigasi bencana dan pembangunan infrastruktur di wilayah padat penduduk.
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The gravity method is used to detect variations in subsurface rock density, making it helpful in identifying hidden fault structures. Identifying the Kendeng Fault, particularly the Waru segment, is important because this area is tectonically active and has a high potential for geological hazards. Further analysis was conducted on Bouguer anomaly data using several derivative approaches to support the identification process. The Bouguer anomaly was analyzed using the First Horizontal Derivative (FHD), First Vertical Derivative (FVD), Total Horizontal Derivative (THD), Second Vertical Derivative (SVD), and Analytic Signal (AS) to detect the position of active faults in northern East Java. This analysis shows high-density anomalies that correlate with subsurface geological structures in the study area. The Bouguer anomaly data were also modeled to illustrate the two-dimensional (2D) subsurface density distribution. The forward modeling along three cross-sections supports the interpretation results from FHD, FVD, THD, SVD, and AS, indicating the presence of the Kendeng Fault in East Java. This fault is classified as a thrust fault and can potentially generate shallow earthquakes. This study is vital in disaster mitigation planning and infrastructure development in densely populated areas.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Anomali Bougeur, Analisis Spektrum, Geologi, Metode gravitasi, Sesar, Bougeur Anomaly, Spectrum Analysis, Geology, Gravity Method, Fault.
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G70.212 ArcGIS. Geographic information systems. Q Science > Q Science (General) > Q180 Gravitation. Q Science > QC Physics > QC111 Density and specific gravity Q Science > QC Physics > QC179 Gravitational waves--Measurement--Statistical methods Q Science > QC Physics > QC20.7.F67 Fourier transformations
Divisions:	Faculty of Mathematics and Science > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Sutan Herlambang Firmansyah
Date Deposited:	05 Aug 2025 07:37
Last Modified:	05 Aug 2025 07:37
URI:	http://repository.its.ac.id/id/eprint/127001

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