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All Journal BULETIN OSEANOGRAFI MARINA Jurnal Fisika Unand JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Jurnal Geocelebes Journal of Geoscience, Engineering, Environment, and Technology JKTP: Jurnal Kajian Teknologi Pendidikan Buletin Sumber Daya Geologi Jurnal Ilmu Fisika Jurnal Pendidikan Fisika dan Teknologi Indonesian Physical Review Kasuari: Physics Education Journal (KPEJ) JoS ( Journal of International Relations) Fokus Abdimas Jurnal Meteorologi dan Geofisika Jurnal Geosaintek
Farid, Muchammad
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Humanities Astronomy Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences Other

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3D MODELING AND DERIVATIVE ANALYSIS OF THE KETAHUN SEGMENT BASED ON GGMPLUS AND SRTM2 DATA FOR DISASTER MITIGATION Ulandari, Clora; Halauddin, Halauddin; Refrizon, Refrizon; Zakariya, Hilmi; Suhendra, Suhendra; Farid, Muchammad; Sulistiani, Alda; Raihana, Hana; Apriyanti, Nurul
Jurnal Geosaintek Vol. 12 No. 2 (2026)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v12i2.9106

Abstract

interaction between the Sumatra subduction zone and the Sumatra Fault, resulting in high seismic activity. One of the important segments with the potential to cause earthquakes is the Ketahun Segment in Lebong Regency, Bengkulu Province. This study aims to map the three-dimensional (3D) fault structure and identify lithological density contrasts to support disaster mitigation efforts. The methods used include processing GGMPlus and SRTM2gravity satellite gravity data, complete Bouguer correction, regional-residual anomaly separation, first horizontal derivative (FHD) and second vertical derivative (SVD) analysis, and 3D inversion modeling using Grav3D software. The CBA analysis results show anomaly values of –8 to 50 mGal with sharp gradations indicating the presence of major fault structures. SVD and FHD analyses show the dominance of dip-slip faults with significant density contrasts. The 3D inversion modeling shows a density range of 1.02–3.52 g/cm³ with an average value of 2.27 g/cm³, where the low-density zone is at a shallow depth (0–1500 m) and the high-density zone is at a depth of 500–2000 m. The sharp boundary between the two zones indicates an active fault plane at a depth of 1000–2500 m. These findings provide a more representative picture of the fault geometry and can be used as a basis for developing earthquake mitigation strategies and spatial planning based on actual geological conditions in the Bengkulu region.
Co-Authors Al Ansory, Andre Rahmat Al-Ansory, Andre Rahmat Ambarwati Anggi, Arya Putra Apriana, Yelda Apriyanti, Nurul Arif Ismul Hadi Deassy Siska Della Zakia Soleha Gea, Jessica Agnes Soroinama Gumanty, Usman Halauddin Halauddin Hardiansa, Debi Hardiansyah, Debi Hardianza, Meno Harlianto, Budi Hasugian, Basdiki Helinnes, Putri Helmy Fitriawan Henny Johan Insani, Redha Radiatul Junnah, Azima Raudhalia Lizalidiawati Lizalidiawati Maesaroh, Rina Maesaroh, Rina Maesaroh Mayub, Afrizal Mei Indrawati, Mei Muammar, Zaky Naldo, Asrol Nandi Haerudin Onawa, Jonah Prasetyo, Kobin Priscilla, Viona Azhari Rabbani, Muhammad Rifqi Rahmat Al-Ansory, Andre Rahmawati, Nur Shafira Rahmawati, Nurul Ilmi Raihana, Hana Refrizon Refrizon Refrizon Refrizon, Refizon Rendoza Rustadi Rustadi Sesilia, Tiara Setiawan, Randy Putra Sholeha, Della Zakia Siswanti, Liza Alif Suhendra Suhendra Sulistiani, Alda Sumajaya, Erlan Susilaningsih Susilaningsih, Susilaningsih Taufiqurrahman Syah, Muhammad Ulandari, Clora Umaya Umaya, Umaya Verentina, Sendiya Wardana, Rendy Wikrama Yerry Soepriyanto Yuni Setyowati Yurilla Endah Muliatie, Yurilla Endah Zakariya, Hilmi