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All Journal Borneo Engineering: Jurnal Teknik Sipil Magnetic: Research Journal of Physics and It’s Application
Azhalia, Neila Ayuzita
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Astronomy Civil Engineering, Building, Construction & Architecture Physics

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Analisis Potensi Jalur Manifestasi Panas Bumi Maronge Kabupaten Sumbawa Menggunakan Data Gayaberat GGMPlus Sutasoma, Muwardi; Wijayanti, Rosita; Susilo, Adi; Idmi , Mohammad Habibiy; Azhalia, Neila Ayuzita; Arisalwadi, Meidi
Magnetic: Research Journal of Physics and It’s Application Vol. 6 No. 1 (2026): Magnetic: Research Journal of Physics and It’s Application
Publisher : Program Studi Fisika - Universitas San Pedro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59632/magnetic.v6i1.729

Abstract

The increasing national energy demand necessitates the utilization of renewable resources, particularly geothermal energy, which holds significant potential in Indonesia. This research aims to identify potential geothermal manifestation pathways in the Maronge area, Sumbawa (NTB), characterized by surface features (hot springs, fumaroles) with temperatures ranging from 35-43°C. The methodology employed is the gravity method based on GGMPlus satellite data to map subsurface rock density variations. The gravity data processing includes calculating the Complete Bouguer Anomaly (CBA), separating the CBA into regional and residual anomalies using the upward continuation filter, and conducting further analysis using the First Horizontal Derivative (FHD) and Second Vertical Derivative (SVD) technique. The results indicate a negative anomaly in the central area of the study, which is strongly suspected to signify a fault zone or low-density hydrothermal alteration zone. This contact zone serves as a conduit for hot fluids, explaining the emergence of the surface manifestations as an upflow zone. The results of this study can provide additional information for the government in formulating policies for managing the Maronge hot spring potential.
Fault Structure Analysis Using GGMPlus Satellite Gravity Data in Sumenep Regency, East Java for Disaster Mitigation Azhalia, Neila Ayuzita; Sutasoma, Muwardi; Susilo, Adi; Idmi, Mohammad Habibiy; Wijayanti, Rosita; Boimau, Yanti
Borneo Engineering: Jurnal Teknik Sipil Volume 10 Nomor 1 Tahun 2026
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v10i1.633

Abstract

Sumenep Regency is an area that has experienced earthquakes with fatalities caused by activity along the Rembang, Madura, Kangean, and Sakala (RMKS) faults. This study aims to identify subsurface structures, particularly faults, in the  Sumenep region using satellite gravity image data downloaded from GGMPlus.   The gravity acceleration data obtained were processed into Complete Bouguer Anomalies (CBAs) and separated into regional and residual anomalies using a Butterworth filter. Then, First Horizontal Derivative (FHD) and Second Vertical Derivative (SVD) analyses were performed to clarify the anomaly boundaries and subsurface structures. Next, 2D geological modeling was performed on the residual anomaly data to determine the types and boundaries between subsurface formation layers.  The results of the study showed significant variations in gravity anomalies, with high contrasts in the southwest and southeast areas, indicating differences in the density of subsurface rocks. FHD and SVD analyses successfully delineated suspected faults, especially in areas with contact layers between low-and high-density rocks. The 2D modeling showed that the contact layer between the Ngrayong-Tawun  Formation and the Ngrayong-Bulu Formation has a weak bond, making it more vulnerable to triggers such as earthquakes.  These results emphasize the importance of further study and disaster mitigation related to active faults in the region. For future research, it is necessary to conduct field surveys and integrate them with other geophysical methods to improve the accuracy of the results.
Co-Authors Adi Susilo Boimau, Yanti Idmi , Mohammad Habibiy Idmi, Mohammad Habibiy Meidi Arisalwadi Muwardi Sutasoma Wijayanti, Rosita