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All Journal BULETIN OSEANOGRAFI MARINA Jurnal Geocelebes Journal of Geoscience, Engineering, Environment, and Technology Jurnal Ilmu Fisika Jurnal Pendidikan Fisika dan Teknologi Indonesian Physical Review Aceh International Journal of Science and Technology Jurnal Meteorologi dan Geofisika
Raihana, Hana
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Agriculture, Biological Sciences & Forestry Astronomy Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Materials Science & Nanotechnology Physics

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Identification Lithology of Geothermal Potential Areas Using the Electrical Resistivity Tomography (ERT) Method Raihana, Hana; Suhendra, Suhendra; Nazli, Khairun; Halauddin, Halauddin; Refrizon, Refrizon
JURNAL GEOCELEBES Vol. 8 No. 2: October 2024
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/geocelebes.v8i2.25377

Abstract

The rock lithology of the potential hydrothermal area has been studied using Electrical Resistivity Tomography (ERT) in Pungguk Pedaro Village, Bingin Kuning District, Lebong Regency. Field data acquisition uses a stretch length of 480 meter with the MAE X612-EM Geoelectric tool that forms a straight line. ERT method, using Res2dinvx64 software. The study aims to determine the subsurface conditions of the potential hydrothermal area and the characteristics of the rocks that make up the hydrothermal area. The results of this study can be concluded that Pungguk Pedaro Village is dominated by clay, sandstone, sandy gravel, andesite, basalt, and granite rocks. In this study, measurements were taken with six lines to see variations in resistivity values as a reference for identifying potential geothermal lithologies. There is 1 line that cuts to five lines to validate the resistivity value of each line. Line 1 has no potential for hydrothermal distribution because there has been a mixture of hydrothermal water with mountain water, so this line will only provide groundwater.
Investigation of Sediment Layer Thickness Estimation at Bengkulu University Hospital Based on Microtremor Data Al Ansory, Andre Rahmat; Raihana, Hana; Farid, M; Hadi, Arif Ismul
JURNAL GEOCELEBES Vol. 8 No. 1: April 2024
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/geocelebes.v8i1.28144

Abstract

Bengkulu is the capital of Bengkulu Province and is located in the subduction zone between the Eurasian and Indo-Australian plates. Bengkulu is also close to the major faults of Sumatra, namely the Musi fault, the Ketahun fault, and the Manna fault. Therefore, regional planning and infrastructure development for earthquake mitigation is necessary. The purpose of this study is to estimate the thickness of the sedimentary layers in the construction zone of Bengkulu Hospital during the earthquake attenuation phase. This study is conducted by surface geological analysis using the HVSR method; data analysis using microtremor data. The microtremor data were analyzed using the HVSR method to obtain the amplification value (A0) and the dominant frequency (f0). HVSR analysis gave dominant frequency (f0) values from 5.1 to 5.8 Hz, amplification (A0) from 1.64 to 5.91 times, and dominant period (T0) from 1.49 to 2.81 seconds. The values of A0, f0, T0 are interpreted with reference to the literature and surface geology as a moderate risk of seismic vulnerability, characterized by moderate to weak sedimentation and moderate amplification values.
Identification of Groundwater Presence Using ERT (Electrical Resistivity Tomography) in Berkas Village, Teluk Segara Sub-district, Bengkulu City Fauzi, M. Wilzam; Suhendra, Suhendra; Refrizon, Refrizon; Halauddin, Halauddin; Rabbani, M Rifqi; Al Rafly, Tegar; Al Ansory, Andre Rahmat; Raihana, Hana; Rahmawati, Nurul 'Ilmi; Tri Utami, Olga
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 10 No 2 (2024): July - December
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v10i2.7717

Abstract

Kelurahan Berkas is a coastal area in Teluk Segara Sub-district, Bengkulu Regency, Bengkulu Province. The purpose of this research is to identify the presence of groundwater in Kelurahan Berkas. The method used was resistivity geoelectric method with Wenner-Schlumberger configuration. This research applied three lines, the first in the Southwest-Northeast direction and the second in the East-West direction, with a length of 240 metres each. The results show that the free aquifer layer in the first pass has a resistivity value of 1.61 Ω.m to 3.98 Ω.m at a depth of 7 metres to 24 metres. While the second pass has a resistivity value of 3.17 Ω.m to 9.23 Ω.m at a depth of 8 metres to 36.9 metres and the third pass has a resistivity value of 1.62 Ω.m to 7.05 Ω.m at a depth of 2 metres to 20 metres. The results also show that the lithology of the aquifer layer in the study area is interpreted as clay, sandy clay, and sand. This layer contains groundwater that has been affected by seawater intrusion. The influence of this intrusion causes the groundwater to have a relatively low percentage of salinity so that the groundwater at the research location feels brackish. The existence of seawater intrusion is caused by the kelurahan berkas right on the coast so that the kelurahan berkas community lacks clean water, so the well water becomes brackish, therefore with this research the community can find out the location or point where there is groundwater.
Subsurface Characterization Using Multichannel Analysis of Surface Waves (MASW) for Coastal Abrasion Mitigation and Geotourism Planning at Nangai Beach, North Bengkulu Insani, Redha Radiatul; Hadi, Arif Ismul; Farid, Muchammad; Raihana, Hana; Al Ansory, Andre Rahmat; Muammar, Zaky
Jurnal Meteorologi dan Geofisika Vol. 26 No. 1 (2025)
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/jmg.v26i1.1152

Abstract

Subsurface rock weakness is considered a contributing factor to the high abrasion rate along Nangai Beach, North Bengkulu. This study aims to characterize the subsurface structure using shear-wave velocity (Vs) data derived from Multichannel Analysis of Surface Waves (MASW) at 21 measurement points along the coastline. The data were processed using WinMASW 5.0 Professional software, beginning with dispersion curve picking in the fundamental mode and followed by inversion to generate one-dimensional Vs profiles along with corresponding density and layer thickness. Interpretation of the 1D and 2D Vs profiles indicates that most of the study area is dominated by soft rock formations with generally low Vs30 values, highlighting the area’s vulnerability to coastal abrasion. Recommended mitigation strategies include natural restoration through coastal vegetation, construction of protective structures, and implementation of regional zoning to safeguard tourism and residential areas. Furthermore, active community participation in tourism management is essential to achieve a sustainable balance between environmental preservation and economic development. Overall, the findings provide valuable input for local governments in designing effective abrasion mitigation strategies and sustainable geotourism development plans.
Use of the Diffuse Field Assumption (DFA) Method to Determine The Condition of The Subsurface Layer in The Government Office Area of Bengkulu City, Indonesia Efmadani; Farid, Muchammad; Refrizon; Raihana, Hana; Anggi, Arya Putra; Hasugian, Basdikki; Al-Ansory, Andre Rahmat
Journal of Geoscience, Engineering, Environment, and Technology Vol. 11 No. 02 (2026): JGEET Vol 11 No 02 : June (2026)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2026.11.02.27025

Abstract

Bengkulu City lies in an earthquake-prone region because of tectonic activity along the Sumatra subduction zone. Subsurface characterization is critical for safe infrastructure planning. This study identifies subsurface conditions in the Bengkulu City Government office area using microtremor data analyzed with the Diffuse Field Assumption (DFA) approach. Researchers recorded 52 measurement points to determine key seismic parameters: dominant frequency (f0), amplification factor (A0), seismic vulnerability index (Kg), and shear wave velocity (Vs30). The results show that f0 values range from 3.57 to 14.8 Hz, A0 from 1.62 to 7.18, Kg from 0.30 to 6.35, and Vs30 from 189.29 to 740.48 m/s, indicating significant spatial variation in subsurface conditions. Areas characterized by low f0, high A0, and low Vs30, particularly at points T33 and T41, are identified as zones with higher seismic vulnerability. The application of the DFA approach enables a more reliable estimation of subsurface shear wave velocity and enhances the interpretation of site effects compared to conventional analysis. These findings highlight the importance of integrated seismic parameter mapping to support earthquake hazard mitigation and urban spatial planning in tectonically active regions.
2D and 3D Models of Rainfall-Induced Landslide-Prone Areas Using Electrical Resistivity Imaging (ERI) in Liku Sembilan, Central Bengkulu, Indonesia Sari, Sefti Dewi; Suhendra; Refrizon; Novita, Gina Soffia; Halauddin; Raihana, Hana; Ramadhani, Yola Dwi
Journal of Geoscience, Engineering, Environment, and Technology Vol. 11 No. 3 (2026): Articles In Press Vol 11 No 3 2026
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Liku Sembilan, Central Bengkulu, is a landslide-prone area characterised by steep topography, intense weathering, and high annual rainfall. This study aims to identify the geometry and depth of the slip surface using integrated 2D and 3D Electrical Resistivity Imaging (ERI) to improve the characterisation of subsurface conditions associated with landslide occurrence. Data acquisition was conducted using the Wenner–Schlumberger array with 48 electrodes. The 2D survey was performed along a 94 m profile with 2 m electrode spacing, while the 3D survey covered approximately 1,750 m² using six parallel lines with 5 m line spacing and 10 m electrode spacing. Data were processed using Res2DInv and ERTLab-ViewLab3D. The inversion model produced an RMS error of 34.3% at the second iteration, which is considered acceptable given the complex topographic and geological conditions of the study area. The results reveal a low-resistivity zone (18–53 Ω·m) at a depth of approximately 5–10 m, interpreted as a water-saturated clay layer that serves as the main slip surface. The identified slip surface exhibits a curved geometry with a slope of 25–35°, indicating a rotational landslide mechanism. The integrated 2D and 3D ERI models provide a more comprehensive visualisation of the spatial continuity and geometry of the slip surface than a single-model approach. In addition, very low-resistivity zones (1–10 Ω · m) indicate areas of groundwater accumulation that may contribute to slope instability. These findings demonstrate the effectiveness of combined 2D and 3D ERI for landslide characterisation in tropical volcanic terrains and provide important information for slope-hazard mitigation and subsurface drainage planning.
Co-Authors Al Ansory, Andre Rahmat Al Rafly, Tegar Al-Ansory, Andre Rahmat Anggi, Arya Putra Ansory, Andre Rahmat Al Apriyanti, Nurul Arif Ismul Hadi Arya Putra Anggi Azzahra, Gusti Ayu Zahwa Daniel, Adrian Efmadani Farid*, Muchammad Farid, Muchammad Fauzi, M. Wilzam Febriansyah, Gian Ori Gumanty, Usman Halauddin Halauddin Halauddin Hardiansa, Debi Hardiansyah, Debi Harlianto, Budi Hasugian, Basdikki Helinnes, Putri Insani, Redha Radiatul Kausari, Alfata M Farid Muammar, Zaky Nazli, Khairun Novita, Gina Soffia Nurhayati, Ratna Dewi Rabbani, M Rifqi Rabbani, Muhammad Rifqi Rafly, Tegar Al Rahmat Al-Ansory, Andre Rahmat, Andre Rahmawati, Nurul 'Ilmi Ramadhani, Yola Dwi Refrizon Refrizon Refrizon Sahputra, Rio Saputri, Winda Sari, Sefti Dewi Suhendra Suhendra Suhendra Taufiqurrahman Syah, Muhammad Tri Utami, Olga Yuni Setyowati