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Al Rubaiyn
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Kantor Jurusan Teknik Geofisika, Gedung GKU Kampus Bumi Tridharma Anduonohu Kendari, 93132
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Kota kendari,
Sulawesi tenggara
INDONESIA
Jurnal Rekayasa Geofisika Indonesia
Published by Universitas Halu Oleo
ISSN : 26858657     EISSN : 26858649     DOI : https://doi.org/10.56099/jrgi
Core Subject : Science, Engineering,
Computer Science & IT Earth & Planetary Sciences Engineering Physics
JRGI (Jurnal Rekayasa Geofisika Indonesia) merupakan jurnal ilmiah yang memuat hasil-hasil penelitian yang mencakup kajian teoretik, simulasi dan modeling, eksperimen, rekayasa dan eksplorasi dalam bidang Geofisika dan Aplikasinya. Bidang-bidang yang masuk dalam ruang lungkup jurnal ini adalah: Rekayasa Geofisika Seismologi Geofisika Perminyakan Fisika Teori Geofisika Komputasi Geofisika Instrumentasi Fisika Material Oseaografi Meteorologi (Fisika Atmosfer)
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geofisika
Articles 30 Documents
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Analisa Keterdapatan Batugamping Menggunakan Metode Resistivitas Pada Blok A Area Penambangan PT Graha Batu Perdana Kecamatan Bungku Pesisir Kabupaten Morowali Tesalonika Mangnga Tolan; Jahidin Jahidin; Erzam Salahudin Hasan
Jurnal Rekayasa Geofisika Indonesia Vol. 5 No. 03 (2023): Edisi Desember 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.v5i03.18

Abstract

This research was conducted to determine the resistivity values and the presence of limestone in Block A of PT Graha Batu Perdana mining area, Bungku Pesisir Subdistrict, Morowali Regency, using the Wenner-Schlumberger resistivity method. This study utilized secondary data and falls under the category of data processing studies, with measurements conducted along 4 traverses, each with a length of 310 m. The data obtained consisted of potential difference values and current strength, which were then processed using Microsoft Excel to obtain resistivity values. Subsequently, a 2D processing was carried out using res2Dinv to generate a 2D cross-section, which was then interpreted to identify subsurface conditions based on resistivity values. The distribution of limestone in the research area along 4 traverses is as follows traverse 1 had a resistivity value of 694 Ωm with a thickness of 30,14 m, traverse 2 had resistivity values ranging from 1089 to 2350 Ωm with thinknesses between 28,15 and 43,14 m, traverse 3 had resistivity values ranging from 544 to 15108 Ωm with thinknesses between 1,25 and 39,4 m, traverse 4 had resistivity values ranging from 710 to 3325 Ωm with thinknesses between 38,15 m.
Identifikasi Ketebalan Lapisan Sedimen Menggunakan Data Mikrotremor Di Kecamatan Kadia Kota Kendari La Hamimu Hamimu; Agnes Maindan; Abdul Manan
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.v5i02.21

Abstract

This study aims to determine the value of the distribution of sediment layer thickness. This research was conducted in the Kadia District area, Kendari City, with data collection carried out at 16 measurement points with intervals for each point varying from 400 to 600 meters with a sampling frequency of 100 Hz. The data obtained from this study is in the form of ground vibration data which is then downloaded software DataPro.exe East-Westhorizontal component, the North-South vertical component Up-Down. The downloaded microtremor data is then processed using a device software Geopsy 4.3.2 to obtain the H/V curve. The dominant frequency value (f0) is obtained from the H/V curve with a dominant frequency range of 1.247 Hz to 4.955 Hz and the shear (VS30) is obtained from the website www.USGS.gov with a VS30 of 276 m/s up to 301 m/s. Based on the data that has been obtained, the distribution value of the sediment layer thickness (h) will be determined. The value of the thickness of the sediment layer (h) in the study area ranged from 13,016 meters to 59,473 meters.
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  
Analisis Ketebalan Lapisan Sedimen Menggunakan Metode Horizontal to Vertical Spectral Ratio (HVSR) di Wilayah Pesisir Kecamatan Moramo Kabupaten Konawe Selatan: Laode Ihksan Juarzan; Wan Azizah Wan Jafar; La Hamimu Hamimu; Indrawati Indrawati
Jurnal Rekayasa Geofisika Indonesia Vol. 5 No. 03 (2023): Edisi Desember 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.v5i03.27

Abstract

Research has been carried out in the coastal area of ​​Moramo District, South Konawe Regency. This study aims to determine the value of the distribution of sediment layer thickness. Data collection was carried out using a TDL-303S seismometer at 15 measurement points. Microtremor data were analyzed using the HVSR method (Horizontal To Vertical Spectral Ratio) use software geopsy 3.4.2 to obtain the dominant frequency value (f0) which then determines the value of the wave velocity shear (VS30) to obtain the value of the thickness of the sediment layer (h). The results of data analysis obtained the dominant frequency value (f0) obtained ranged from 1.025 Hz to 14.297 Hz and the wave speed values shear (VS30) obtained from website www.USGS.gov with a range of values ​​ranging from 234.43 m/s to 422.33 m/s. Based on the data obtained, the value of the distribution of sediment layer thickness (h) will be determined. The thickness of the sediment layer in the study area ranged from 6.596 meters to 66.124 meters.
Analisis Ketebalan Lapisan Sedimen Menggunakan Metode Horizontal to Vertical Spectral Ratio (HVSR) di Daerah Perbukitan Kecamatan Moramo La Hamimu Hamimu; Laode Ihksan Juarzan; Nurul Irana Pathiasari
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil 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.v6i01.29

Abstract

This research aims to determine value of the thickness of sediment layer (h) and the type of soil layer in the hilly area of Moramo District. This research uses microtremor data obtained from the TDL-303S Seismometer at 15 points with a distance between points of 400 m–800 m and shear wave velocity values up to a depth of 30 m (Vs30) obtained from USGS website data. Microtremor data were analyzed using HVSR method with Geopsy 3.4.2 software to obtain the dominant frequency value. The shear wave velocity value was extracted using ArcGis 10.8 software to determine Vs30 value at each measurement point. The f0 and VS30 values are used to determine the sediment layer thickness (h). The analysis results show that sediment layer thickness range between 5,03 m–47,43 m. The distribution map of sediment layer thickness values shows that research area with high sediment layer thickness values is located in a small part of Ulusena Village and Watu Porambaa Village. So, these two areas are at greater risk of experiencing damage due to earthquakes. The type of soil layers based on soil classification by Kanai (1983) are classified into 4 types of soil with the research area being dominated by Type I soil, where this type is tertiary or older rock consisting of hard gravelly sandstone. Type I is located in Wonua Jaya Village, the western and southern parts of Sumbersari Village, the eastern part of Pudaria Jaya Village, as well as small parts of Watu Porambaa and Ulusena Village.
Simulasi Tinggi Gelombang Laut Signifikan di Selat Makassar Pada Bulan Januari-Februari 2016 Muhammad Riza; Qori Fajar Hermawan; Zetsaona Sihotang; Nanda Khoirunisa; Idris Mandang
Jurnal Rekayasa Geofisika Indonesia Vol. 5 No. 03 (2023): Edisi Desember 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.v5i03.30

Abstract

Knowledge of the characteristics of sea waves is very important for many maritime fields such as shipping safety, offshore industry, coastal area development, defense, and ship design. As the largest maritime country in the world, Indonesia is vulnerable to high sea waves. BMKG adopts the third generation wave model, namely WAVEWATCH-III which was developed by NOAA, USA. This model is used to predict the height and direction of sea waves in Indonesian waters. The purpose of this study is to determine the characteristics of the results of the WAVEWATCH-III wave model in the Makassar Strait. In January-February 2016 significant sea wave heights ranged from 0 m to 1.5 m and the direction of the waves came from the northeast in the Makassar Strait. Significant wave heights in January-February 2016 were not at a level that endangered shipping lanes in the Makassar Strait area. Keywords: Ocean Waves, Makassar Strait, Wave Model.
Interpretasi Bawah Permukaan dan Delineasi Struktur Cekungan Muna-Buton Berdasarkan Data Gravitasi Satelit Muhammad Nur Ahsan Zakir; Wawan Gunawan Abdul Kadir; Eko Januari Wahyudi
Jurnal Rekayasa Geofisika Indonesia Vol. 5 No. 03 (2023): Edisi Desember 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.v5i03.31

Abstract

Island of Buton is a region located in the Southeast Sulawesi region, Indonesia. The formation of Buton Island is the result of intense tectonic processes, resulting in diverse geological resources, including natural resources such as oil and natural gas accumulated in a sedimentary basin. Gravity field measurements have been conducted to interpret subsurface structures in the Muna-Buton Basin. The data used consist of free air gravity anomaly data, requiring corrections for Bouguer and terrain to obtain a complete Bouguer anomaly. Anomaly separation is performed using trend surface analysis method. Gradient analysis is conducted on residual anomalies to delineate basin structures in the research area using several methods, including horizontal gradient, total gradient, tilt-angle horizontal gradient, and improved logistic filter. Qualitatively, two sub-basins can be delineated: Sub-basin A is in the east and sub-basin B is in the west. Sub-basin A is estimated to be the Bulu sub-basin, while sub-basin B is the Buton Strait sub-basin. Based on subsurface modeling results, there is a basement layer indicated to be at an estimated shallowest depth of 2 km in the Buton Strait sub-basin and an estimated shallowest depth of 3 km in the Bulu Basin sub-basin. The depth of this basement layer increases towards the center of the basin, reaching more than 4 km.
Identifikasi Intrusi Air Laut pada Air Tanah Menggunakan Metode Geolistrik Tahanan Jenis Wenner-Schlumberger (2D) di Pulau Balu, Desa Santiri, Kecamatan Tiworo Utara, Kabupaten Muna Barat Ikhsan Cahyadi; Syamsul Razak Haraty; La Ode Ihksan Juarzan
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil 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.v6i01.42

Abstract

This research aims to identify sea water intrusion in groundwater using the Wenner-Schlumberger configuration (2D) resistivity geolectric method on Balu Island, Santiri village, Tiworo Utara sub-District, West Muna Regency. This research uses primary data which is resistivty measurement data measured in the field aimed at identifying groundwater aquifers. The interpretation data is then reconstructed into 2D cross-sectional profile using Res2Dinv software. The results obtained in the research area show that sea water intrusion has occurred in groundwater at an average surface depth of up to 39.6 meters with low resistivity values ​​between 0.06 – 807 Ohm-meters
Estimasi Sumber Daya Lapisan Laterit Menggunakan Data Resistivitas di Desa Morombo Pantai Konawe Utara Juan Gilbert; Jahidin Jahidin; Al Rubaiyn
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil 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.v6i01.60

Abstract

This research was conducted in Morombo Pantai Village, Langgikima District, North Konawe Regency which aims to model nickel laterite deposits in 2D and 3D to describe the distribution of nickel laterite deposits in the subsurface based on resistivity values. The inversion process uses Res2DInv software to produce 2D ERT cross-sections and the distribution of resistivity values that provide an overview of the lithology in the subsurface. These results were then correlated with local coordinates and modeled in 3D using Rockworks17 software. The results show the distribution of laterite deposits with thicknesses ranging from 1.63 m to 59 m that spread from north to south. Based on the 3D modeling results, it is known that the resource of nickel laterite deposits at the research site reaches 2,931,836.0 m3 for the limonite layer and 3,820,284.0 m3 for the saprolite layer
Identifikasi Konfigurasi Struktur Geologi Bawah Permukaan Berdasarkan Data Anomali Medan Gravitasi dengan Teknik Deteksi Tepi dan Dekonvolusi Euler di Daerah Panas Bumi Lainea Nursinta Atsaniyah Misquita; Jamhir Safani; Al Rubaiyn
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 01 (2024): Edisi Arpil 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.v6i01.61

Abstract

this research is located in Lainea District, Lainea Village, Southeast Sulawesi, which aims to determine the subsurface structure based on the edge detection technique and determine the depth of the anomaly source using euler deconvolution. Fault segmentation with varying trends and depths illustrates the complexity of tectonic activity around the research area. The application of several edge detection techniques to the residual anomaly data shows the superiority of the TAHG approach in identifying the edges of geothermal source zones and the alignment of geological structures while the TDX approach only shows the boundaries of the anomalies. The euler deconvolution depth solution shows that the faults generated from the TAHG approach belong to shallow faults.

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