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All Journal Jurnal Rekayasa Geofisika Indonesia Jurnal Rekayasa Geofisika Indonesia
Syamsul Razak Haraty
Jurusan Teknik Geofisika, Universitas Halu Oleo
Computer Science & IT Earth & Planetary Sciences Engineering Physics

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ANALISIS SUSEPTIBILITAS MAGNETIK PASIR DI AREA PESISIR BATU GONG KECAMATAN LALONGGASUMEETO KABUPATEN KONAWE Ysrawati Ysrawati; Jahidin Jahidin; Syamsul Razak Haraty; Pou Anda; Erzam Sahaluddin Hasan; La Ode Andimbara
Jurnal Rekayasa Geofisika Indonesia Vol 4, No 02 (2022): Edisi Agustus JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Jurusan Teknik Geofisika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v4i02.25600

Abstract

Telah dilakukan penelitian dengan tujuan untuk menentukan nilai suseptibilitas magnetik pasir dan jenis mineral magnetik yang terkandung pada pasir di area pesisir Batu Gong. Pengambilan sampel dilakukan secara grid dengan jumlah 63 titik di area pesisir Batu Gong. Panjang keseluruhan lokasi penelitian 2 km, untuk jarak antar titik pengambilan sampel 30 m pada setiap titik dengan kedalaman 30 cm. Pengukuran nilai suseptibilitas magnetik pasir dilakukan dengan menggunakan alat Bartington MS2B. Berdasarkan hasil pengukuran diperoleh nilai suseptibilitas magnetik sampel pasir berada pada rentang nilai 2,7 x 10-8m3/kg – 8 x 10-8m3/kg, dengan kandungan mineral magnetik berupa  pyrite (FeS2) dan biotite (Mg, Fe, AL Silikat), sedangkan hasil pengukuran analisis geokimia X- Ray Diffraction (XRD) diperoleh persentase senyawa quartz berkisar antara 79,48% - 85,60%  dan persentase senyawa mica berkisar antara 14,39% - 19,51%.
Mapping Magnetic Susceptibilitys as an Estimation of Heavy Metal Pollution in Topsoil along Ranomeeto-Kendari Road, Kendari City Syamsul Razak Haraty; Erzam Sahaluddin Hasan; Putria Melinda
Jurnal Rekayasa Geofisika Indonesia Vol. 5 No. 02 (2023): Edisi Agustus Jurnal Rekayasa Geofisika Indonesia (JRGI)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v5i02.26

Abstract

This study aims to identify and map the magnetic susceptibility values as an estimation of heavy metal contamination in the upper soil layer along the Bypass Road in Kendari City. The research employed a quantitative approach with direct measurements conducted in the laboratory. The results revealed that the magnetic susceptibility values in the upper soil layer of the Bypass Road in Kendari City ranged from 6,8 x  – 1600,4 x . Additionally, the study detected the presence of heavy metals such as Nickel (Ni), Iron (Fe), Chromium (Cr), and Cobalt (Co) in the soil. The detected heavy metal contents exhibited significant variations, with Nickel ranging from 80 to 7920 ppm, Iron ranging from 38150 to 49920 ppm, Chromium ranging from 1210 to 21650 ppm, and Cobalt ranging from 140 to 850 ppm. These findings provide valuable insights into the potential heavy metal contamination along the Bypass Road in Kendari City and serve as a crucial basis for environmental mitigation and management efforts in the area. Key words: magnetic susceptibility, heavy metals, soil  
Estimasi Sistem Perlapisan pada Blok-A Area Panas Bumi Lainea Konawe Selatan Menggunakan Vertical Electrical Sounding (Ves) Konfigurasi Schlumberger Syafira Mpuhu; Jamhir Safani; Syamsul Razak Haraty
Jurnal Rekayasa Geofisika Indonesia Vol. 7 No. 02 (2025): Edisi Agustus JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v7i02.19

Abstract

This research aims to estimate the layering system in the Lainea Geothermal area in South Konawe Regency. The apparent resistivity data obtained from the Pusat Sumber Daya Geologi (PSDG) measured in 2010 using the Schlumberger configuration was inversed with the particle swarm optimization (PSO) method. From the results of data inversion at both sounding points, it was found that there are five layers with different resistivity ranges. The first layer is a thin overburden near the surface with a thickness of 0.5 - 0.7m. The second layer is thought to be conglomerate rock. The third layer is interpreted as cap-rock with meta-sandstone lithology with a resistivity value range of 126.3<ρ<366 Ωm. The fourth layer with sandstone lithology is closely suspected as a fluid accumulation zone with a resistivity value range of 45.4<ρ<69 Ωm. The lowest layer with a resistivity value range of 261<ρ<500 Ωm is interpreted as metamorphic rock which is thought to act as an impermeable layer.
Analisis Energi Angin Sebagai Pembangkit Energi Listrik di Kecamatan Wawonii Utara La Ode Sukirman; Irawati; Syamsul Razak Haraty
Jurnal Rekayasa Geofisika Indonesia Vol. 7 No. 02 (2025): Edisi Agustus JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v7i02.25

Abstract

Research has been carried out to determine the potential for wind energy in North Wawonii dictrict konawe island regency. Research methods include collecting wind speed data and calculating wind energy potential. Wind speed was measured using a Benetech GM816 digital Anemometer from 16 to 21 June 2023 for 9 hours per day, then a wind distribution map was made using Surfer 13 software to determine the distribution of wind direction. The results of the analysis of the average potential wind speed in six days in North Wawonii district range from 2.06 m/s to 5.98 m/s with an average of 3.63 m/s and the resulting power (cp) of 22.34 watts to 33.18 watts with an average of 27.91Watts and Effective Power (Ea) ranges from 11.29 watts to 16.91 watts with an average of 14.22 watts. Based on the results of the analysis of minimum, maximum and average wind speeds in coastal areas and mountainous areas in the North Wawonii area over a period of six days, it can be concluded that the wind speeds that occur have the potential to be utilized because they are classified as class 4 wind speed criteria on the Beaufort scale..
Identifikasi Sistem Perlapisan Blok – B Area Panas Bumi Lainea Konawe Selatan Menggunakan Metode Vertical Electrical Sounding (Ves) Konfigurasi Schlumberger Annisa Tiara Saputri; Jamhir Safani; Syamsul Razak Haraty
Jurnal Rekayasa Geofisika Indonesia Vol. 8 No. 01 (2026): Edisi April JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v8i01.20

Abstract

Gravity forward modeling based on the Last–Kubik kernel requires intensive computation as the number of model blocks and observation points increases. This study analyzes the computational performance of Full Vectorization (FV) compared with Nested Loop (NL) without modifying the mathematical formulation of the Last–Kubik kernel. Experiments were conducted using synthetic models with 20 configurations ranging from 20,000 to 168,200 blocks. Algorithm performance was evaluated based on gravity-response consistency, computational time, and memory usage. Computational time was assessed using Total Execution Time (TET) and Mean Core Computational Time (MCCT) from 30 repetitions, while memory usage was evaluated using Kernel Workspace Memory Increase (KWMI). The results show that the FV and NL implementations produce numerically identical gravity responses, with a maximum absolute difference of 0 for the tested configurations. FV provides an MCCT speedup of approximately 6–7 times for small to medium-sized models, but the speedup decreases to 1.56 times at 168,200 blocks. In contrast, FV requires approximately 18 times more memory than NL. Regression analysis shows a very strong linear relationship between KWMI and the number of observation–block pairs. The results demonstrate that FV effectively accelerates gravity forward modeling but has scalability limitations due to its substantially higher memory requirements
Studi Geofisika Terhadap Bidang Gelincir pada Daerah Rawan Longsor Menggunakan Metode Geolistrik Konfigurasi Wenner – Schlumberger di Desa Lamboo Kecamatan Moramo Kabupaten Konawe Selatan Syamsul Razak Haraty; Sadirga Karim; La Ode Andimbara
Jurnal Rekayasa Geofisika Indonesia Vol. 8 No. 01 (2026): Edisi April JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v8i01.195

Abstract

This study aims to identify the presence and depth of slip planes in landslide-prone areas in Lamboo Village, Moramo Subdistrict, South Konawe using the Wenner-Schlumberger configuration of the electrical resistivity method. The method involes injecting electric current into the ground and measuring the potential diffrerence to determine subsurface resistivity variations. Measurements were conducted along five survey lines to reveal subsurfaces  geological  structures  potentially  acting  as  landslide zones. The inversion results showed low resistivity zones interpreted as water-satured clay layers, which serve as slip planes. These slip zones vary in depth acroos the survey lines. The findings are crucial for landslide risk mitigation and can inform safer land-use planning for local communities
Co-Authors Annisa Tiara Saputri Erzam Sahaluddin Hasan Irawati Jahidin Jahidin Jamhir Safani La Ode Andimbara La Ode Sukirman Pou Anda Putria Melinda Sadirga Karim Syafira Mpuhu Ysrawati Ysrawati