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All Journal BULETIN OSEANOGRAFI MARINA BERKALA FISIKA TELKOMNIKA (Telecommunication Computing Electronics and Control) IJOG : Indonesian Journal on Geoscience GRADIEN Jurnal Fisika Unand Jurnal Fisika FLUX Jurnal Geocelebes Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Ilmu Fisika Jurnal Pendidikan Fisika dan Teknologi Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Indonesian Physical Review Jurnal Kumparan Fisika Indonesian Journal on Geoscience Navigation Physics : Journal of Physics Education Indonesian Journal on Geoscience J-ABDIPAMAS (Jurnal Pengabdian Kepada Masyarakat) Jurnal Fisika
Arif Ismul Hadi
Department Of Physics, Faculty Of Mathematics And Natural Sciences, University Of Bengkulu
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Landslide Potential Investigation for Disaster Risk Reduction in Central Bengkulu Regency, Bengkulu Province, Indonesia Arif Ismul Hadi; Refrizon Refrizon; Muchammad Farid; Budi Harlianto; Julia Inti Sari
Indonesian Journal on Geoscience Vol. 8 No. 3 (2021)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.8.3.313-328

Abstract

DOI:10.17014/ijog.8.3.313-328Bengkulu Province is the converging path region between the Indo-Australian - Eurasian tectonic plates in the ocean and the Sumatran f ault crossing on the mainland. The condition implies that the sliding force of the slab is easy to trigger fractures and to cause the material to be relatively less elastic, resulting in high seismic intensity. This study aims to identify areas with the potential for landslides and its mapping, and to analyze the factors that cause landslides in Central Bengkulu Regency, Bengkulu Province, Indonesia. This study was conducted using rock physical parameters of ground shear strain (GSS) which were correlated with parameters of slope, slope height, Vs30 value, fault distance to measurement point, rock conditions, rainfall, and PGA value. Furthermore, these parameters were overlaid thoroughly by the statistical method of the Analytical Hierarchy Process (AHP). Data acquisition is divided into two stages, namely the secondary data collection stage and the field survey stage. Secondary data collection was carried out to support the creation of landslide potential maps, analysis, and field survey data input. Secondary data is the value of Vs 30, the distance of the fault to the measurement point, rainfall, and the PGA value. Field survey data are in the form of GSS values, slope, slope height, and rock conditions. The results of this study are identified areas that have the category of high, medium, and low landslide potential. Based on the calculated parameters, the GSS parameter is the most dominant which affects the landslide potential in the studied area.
Model 2D of Subsurface Structures in the Dempo Magnetic Area of Pagar Alam City Using Geomagnetic Method Febri Adrianto Adrianto; Refrizon; Arif Ismul Hadi
Jurnal Kumparan Fisika Vol. 6 No. 3: Desember 2023
Publisher : Unib Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jkf.6.3.167-176

Abstract

ABSTRAK   Metode geomagnetik digunakan dalam penelitian ini untuk membuat model 2D struktur bawah permukaan di kawasan Dempo Magnet kota Pagar Alam berdasarkan sebaran anomali. Terdapat 48 titik pengukuran pada lokasi penelitian. Pengolahan data dilakukan dengan membuat peta anomali magnetik total. Koreksi diurnal dan koreksi international geomagnetic reference field (IGRF) dilakukan untuk mendapatkan nilai anomali magnetik total. Data magnetik tersebut kemudian diolah untuk memisahkan anomali regional dan anomali residual menggunakan bandpass filter, kemudian dilakukan transformasi reduksi ke kutub, dan pemodelan 2D menggunakan metode forward modeling. Hasil analisis kisaran nilai anomali magnet di kawasan magnet Dempo kota Pagar Alam diperoleh nilai anomali magnet tertinggi sebesar 781,8 nT, sedangkan anomali magnet terendah sebesar -796,6 nt. Hasil pemodelan 2D pada data magnetik diperoleh 4 lapisan batuan bawah permukaan dengan kedalaman sekitar 165 meter, dimana lapisan batuan pertama berupa breksi gunung api, lapisan batuan kedua berupa endapan piroklastik, lapisan batuan ketiga berupa basal, dan lapisan batuan terakhir. adalah gabro.   Kata Kunci: Metode Magnetik, Intensitas Anomali Medan, Pemodelan 2D, Struktur Bawah Permukaan   ABSTRACT   The geomagnetic method was used in this research to create a 2D model of subsurface structures in the Dempo Magnet area of ​​Pagar Alam city based on the distribution of anomalies.  There were 48 measurement points at the researched location.  Data processing was carried out by creating a total magnetic anomaly map.  Diurnal correction and international geomagnetic reference field (IGRF) correction were carried out to obtain total magnetic anomaly values.  The magnetic data was then processed to separate regional anomalies and residual anomalies used a bandpass filter, then a reduction transformation to the poles was carried out, and 2D modeling used the forward modeling method.  The results of the analysis of the range of magnetic anomaly values ​​in the Dempo magnet area of ​​Pagar Alam city obtained the highest magnetic anomaly valued of 781, 8 nT, while the lowest magnetic anomaly was -796, 6 nt.  The results of 2D modeling on magnetic data obtained 4 subsurface rock layers with a depth of around 165 meters, where the first rock layer was volcanic breccia, the second rock layer was pyroclastic sediment, the third rock layer was basalt, and the last rock layer was gabbro.   Keywords: Magnetic method, Field anomaly intensity, 2D modeling, Subsurface structures
Studi Kecepatan Tanah Maksimum (PGV), Percepatan Tanah Maksimum (PGA) dan Skala Intensitas Kerusakan (MMI) Gempa Bumi di Kabupaten Bengkulu Utara Arrahma, Mawadatul; Hadi, Arif Ismul; Harlianto, Budi
Navigation Physics : Journal of Physics Education Vol 6, No 1 (2024): Navigation Physics : Journal of Physics Education Vol. 6 No. 1 Tahun 2024
Publisher : UNIVERSITAS INDRAPRASTA PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30998/npjpe.v6i1.2706

Abstract

North Bengkulu has a significant level of earthquake virility. One method to identify this virginity is through research into the correlation between Peak Ground Acceleration (PGA), Peak Ground Velocity (PGV), and Modified Mercalli Intensity (MMI). The data used came from the United States Geological Survey (USGS), which is secondary data. The data processing process involves applying an empirical formula that describes the relationship between PGV and intensity, as well as PGA and earthquake intensity. Furthermore, the results of the PGA & PGV calculations are incorporated into ArcGis 10.8 to create PGA&PGV contour maps, and the relationship curves of PGA to PGV, PGA, and MMI, and PGV & MMI using Excel 2019. The results of the analysis show that the largest PGV PGA value is in Arga Makmur district which has a intensity of 4.
Analisa Lapisan Sedimen Bawah Permukaan Pada Pembangunan Jalan Elevated Danau Dendam Tak Sudah Kota Bengkulu Menggunakan Metode HVInv Setyowati, Yuni; Farid, Muchammad; Ismul Hadi, Arif; Helinnes, Putri; Hardiansyah, Debi; Refrizon, Refrizon; Gumanty, Usman; Raihana, Hana; Rahmat Al-Ansory, Andre; Taufiqurrahman Syah, Muhammad
Jurnal Ilmu Fisika Vol 16 No 2 (2024): September 2024
Publisher : Jurusan Fisika FMIPA Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.16.2.187-197.2024

Abstract

Bengkulu City is situated within a subduction zone where the Indo-Australian and Eurasian tectonic plates converge, rendering the area highly susceptible to seismic activity. This study employs the microseismic method to assess seismic vulnerability and the subsurface rock structure at the Dendam Tak Sudah Lake Flyover Construction Site in Bengkulu City, which encompasses a swampy region. The microseismic method used was an inversion of the horizontal to vertical (H/V) spectral ratio (HV-Inv) for determining the dominant frequency (f0), amplification factor (A0), seismic sensitivity index (Kg), and shear wave velocity (Vs). The findings reveal that f0 in the study area range from 2.16 to 7.53 Hz, A0 vary from 0.40 to 3.79, and Kg values span from 0.03 to 6.04. The sedimentary layers exhibit an average thickness of 5-10 meters, with some locations showing significantly thicker sedimentary deposits. Notably, the highest seismic susceptibility is recorded at point T8. The Vs values range from 185.19 to 539.49 m/s, which are inversely proportional to the Kg values and indicate soil classifications varying from soft to medium. The overall seismic risk in the study area is moderate. These results offer key insights into geophysical and geological conditions in Bengkulu City, crucial for earthquake mitigation.
Application of Mechanical Waves in Rock Media for Earthquake Disaster Risk Analysis as an Enrichment of Physics Practicum Arif Ismul Hadi; Budi Harlianto; Elfi Yuliza; Hana Raihana; Andre Rahmat Al Ansory
ABDIMAS: Jurnal Pengabdian Masyarakat Vol. 7 No. 2 (2024): ABDIMAS UMTAS: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Universitas Muhammadiyah Tasikmalaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35568/abdimas.v7i2.4519

Abstract

The phenomenon of mechanical waves propagation in rock media is difficult to detect without the use of tools. To "see" the propagation of seismic waves, tools can be used in the form of a main unit monitor on a set of digital Seismograph-16S24-P 24 geophone channel tools. The community service activity aims to provide an understanding of the basic concepts of mechanical wave propagation in rocks to senior high school students throughout Bengkulu City as an enrichment for Physics Practicum. The method used to achieve the objectives of this community service activity is carried out through the stages of Focus Group Discussion (FGD), field data acquisition, data processing, data analysis and interpretation. Activity evaluation is carried out by observing activity participants in data acquisition, data processing, data analysis and interpretation. The results of the activity show that the activity participants have a good understanding of the basic concept of mechanical wave propagation in rocks. Furthermore, Bengkulu City Physics Teachers can transmit this knowledge to senior high school students as an enrichment for Physics Practicum. The material on the application of mechanical waves to rock media can also be used as a learning tool based on disaster risk reduction in the main physics subject, according to the characteristics of the study area.
Studi Mikrozonasi Kerentanan Seismik dan Bangunan Bertingkat Menggunakan Metode HVSR (Horizontal to Vertical Spectral Ratio) di Kabupaten Bengkulu Selatan Novtrisa, Indri; Mase, Lindung Zalbuin; Refrizon, Refrizon; Misliniyati, Rena; Amri, Khairul; Hadi, Arif Ismul; Fadli, Darmawan Ikhlas
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 21, No 3 (2024): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v21i3.19616

Abstract

Mikrozonasi seismik merupakan proses pemetaan untuk memprediksi respon tanah terhadap guncangan seismik yang dapat digunakan sebagai acuan mitigasi bencana dan pembangunan yang akan dilakukan di Kabupaten Bengkulu Selatan. Penelitian ini menggunakan data shapefile peta administrasi dan data mikrotremor sebanyak 69 titik. Data mikrotremor kemudian diolah menggunakan metode HVSR (Horizontal to Vertical Spectral Ratio) untuk mendapatkan kurva HVSR. Pengolahan data ini menghasilkan nilai faktor amplifikasi ( ) pada rentang 1,17 – 4,07, nilai frekuensi natural ( ) antara 0,25 Hz – 14,40 Hz, indeks kerentanan seismik (Kg) antara 0,26 – 11,78,  dan nilai periode dominan ( ) antara 0,07 s – 3,86 s. Parameter ini selanjutnya digunakan untuk membuat peta sebaran yang akan memberikan gambaran mengenai distribusi spasialnya. Selain itu, potensi bangunan yang rentan terhadap bencana seismik dengan ketinggian 1 hingga 2 lantai teridentifikasi di Kecamatan Pino Raya dan Kecamatan Kota Manna, sedangkan bangunan dengan ketinggian 1 hingga 4 lantai berada di Kecamatan Pasar Manna.. Berdasarkan nilai-nilai parameter tersebut, dapat disimpulkan bahwa lokasi penelitian masuk ke dalam kategori zona rendah terhadap getaran gempa bumi. Hasil penelitian ini dapat digunakan dalam perencanaan mitigasi bencana, khususnya dalam upaya peningkatan ketahanan bangunan di wilayah yang diteliti.
Identifikasi Batuan Reservoir Panas Bumi di Daerah Tambang Sawah, Lebong Provinsi Bengkulu Menggunakan Data Gravitasi Satelit GGMPlus dengan Inversi 2D Hardianza, Meno; Hadi, Arif Ismul; Hilmi Zakarya
Jurnal Fisika Unand Vol 14 No 2 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.2.177-183.2025

Abstract

The Tambang Sawah geothermal field located in Lebong Regency, Bengkulu Province, is one of the geothermal energy potentials in Indonesia. The area is associated with tectonic activity in the bukit barisan mountain range which is indicated by the appearance of hot springs and fumaroles. This research uses Global Gravity Model (GGM) gravity data, in the form of Free Air Anomaly (FAA) data with a resolution of 220 metres and shuttle radar topography mission (SRTM2Gravity) as contemporary terrain correction data in the form of full scale gravity data. The FAA data was then subtracted from the full scale gravity data to obtain the complete Bouger anomaly (CBA). The CBA was subjected to spectrum analysis to determine the depth estimate and then separated to obtain regional and residual anomalies using the moving average method. There are three distribution patterns of anomaly distribution, namely low, medium and high. The results showed that on the CBA map, areas with moderate anomalies were thought to have geothermal reservoirs with densities < 2.53 g/cm3 different depths.
Training of Computer-Based Qomariah Month Initial Determination (a Case Study of Determination the Months of Ramadhan, Syawwal, and Dzulhijjah) in Nurul Ikhlas Mosque, Bengkulu City, Bengkulu Province, Indonesia Hadi, Arif Ismul; Refrizon, Refrizon; Harlianto, Budi; Ikhlas Fadli, Darmawan; Awaliyah, Isfardian Agustin; Kamila, Nur Husniatin
ABDIMAS: Jurnal Pengabdian Masyarakat Vol. 6 No. 2 (2023): ABDIMAS UMTAS: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Universitas Muhammadiyah Tasikmalaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35568/abdimas.v6i2.3297

Abstract

The determination of the initial of the Qomariah month is still a difference, especially in determining the initial of Ramadhan, Syawwal, and Dzulhijjah. This can happen because there are differences in the method of determination. The method is in the form of Hisab method and Rukyat method. The purpose of community service activities is to determine the initial of the month of Qomariah based on MABIMS criteria (agreement of the Minister of Religion of Brunei Darussalam, Indonesia, Malaysia, and Singapore on 27-29 June 2012 in Bali) and determine the initial of the month using computer software in the form of Accurate Hijri Calculator (AHC) ver. 2.2.1. The method used in this activity is lecture, practice, and discussion. Based on AHC software application ver. 2.2.1 shows that according to calculation 1 Ramadhan falls on Saturday April 2, 2022, but according to MABIMS criteria it falls on Sunday April 3, 2022. This is a possible difference in the start time of fasting in 2022 in Indonesia. However, for 1 Syawwal, both the calculation and the MABIMS criteria fall on the same day, Monday May 2, 2022, both in Indonesia and in other countries.
DELINEATING RESISTIVITY VALUES OF POTENTIAL GEOTHERMAL AREAS ALONG THE BOGOR FAULT USING 2D MAGNETOTELLURIC INVERSION Hardiansa, Debi; Farid, M; Hadi, Arif Ismul; Al-Ansory, Andre Rahmat; Raihana, Hana; Rahmawati, Nurul 'Ilmi
Indonesian Physical Review Vol. 8 No. 2 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i2.431

Abstract

Kepahiang Regency, located in an active fault zone, has great geothermal potential with an estimated capacity of up to 154 MW(e), making it a strategic renewable energy source to be developed. This research discusses the geothermal potential in the Kabawetan area, Kepahiang, Bengkulu. The main objective of this research is to evaluate the potential of geothermal resources around the Bogor segment by analyzing the subsurface structure using the Magnetotelluric inversion method and 2D resistivity modeling, in order to identify prospective geothermal reservoir zones. It can evaluate the potential of geothermal reservoirs in Kepahiang. The method used is the Magnetotelluric method, which utilizes the Earth's natural electromagnetic field to determine the distribution of resistivity in the subsurface. The results of 2D modeling with the MT method show potential zones associated with variations in subsurface thermal conditions and the presence of conductive clay minerals with resistivity values between 0.14-1 Ωm. These minerals are thought to be associated with the overburden (reservoir) of the geothermal system that has a depth of 2-4 km. The subsurface layer containing hot water and steam originating from heat emitted from the earth's core with a resistivity value of 2.5-45 Ωm at a depth of 1-4 km is thought to be caprock in the geothermal system, a resistivity value of 120-800 Ωm is thought to be hot rock with a depth between 1.5-10 km. It is estimated that there is a type of andesite rock that has been fractured as a reservoir of geothermal fluid. The findings of this research are expected to contribute to renewable energy as an alternative energy in the future, not only for energy needs but also for regional economic development through tourism and to support sustainable governance.
HVSR Microtremor Analysis to Assess Subsurface Fault Characteristics and Geothermal Potential in Kepahiang Rabbani, Muhammad Rifqi; Hadi, Arif Ismul; Harlianto, Budi; Farid, Muchammad; Raihana, Hana; Anggi, Arya Putra
JURNAL GEOCELEBES Vol. 9 No. 2: October 2025
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/geocelebes.v9i2.43347

Abstract

Kepahiang, Bengkulu, is an area with considerable geothermal potential, especially in the Air Sempiang and Babakan Bogor areas. This study aims to analyze subsurface fault characteristics and assess geothermal potential using the Horizontal-to-Vertical Spectral Ratio (HVSR) microtremor method. This passive seismic method is used to determine key geophysical parameters, including dominant frequency (f0), amplification factor (A0), shear wave velocity (vs), and primary wave velocity (vp), which are essential for characterizing subsurface geological structures and identifying geothermal reservoir zones. The results show that dominant frequency values in Kepahiang range from 1.24 Hz to 20.45 Hz, while the amplification factor varies between 1.29 and 7.22. vs values range from 121.61 m/s to 3251.79 m/s, and vp values range from 214.91 m/s to 6469.79 m/s. These findings suggest that the surface layer consists mainly of alluvium and hard sandy gravel, with thicknesses varying between 10 and 50 meters. The 3D subsurface model constructed from the data indicates the presence of fault-controlled geothermal manifestations, mainly influenced by the Babakan Bogor Fault and Bogor Fault. These faults facilitate the upward migration of geothermal fluids, forming surface manifestations such as hot springs, fumaroles, and altered rocks. The geothermal system in the study area is classified as a low-temperature geothermal system, mainly caused by residual magmatic heat from Kaba Mountain and Bukit Hitam Crater. This research provides important insights for geothermal energy exploration and geotourism development in Kepahiang. These findings serve as a scientific basis for future geothermal resource assessment, land use planning, and sustainable energy utilization.
Co-Authors Agung Sedayu Al Ansory, Andre Rahmat Al-Ansory, Andre Rahmat Andre Rahmat Al Ansory Anggi, Arya Putra Ansory, Andre Rahmat Al Arrahma, Mawadatul Ashar Muda Lubis Awaliyah, Isfardian Agustin Darmawan Ikhlas Fadli Darmawan Ikhlas Fadli Efriyadi Efriyadi Elfi Yuliza Fadli, Darmawan Ikhlas Falenia, Felly Farid, Muchammad Farid, Muchammad Farid, Muchammad Farid, Muhammad Febri Adrianto Adrianto Frinsyah Virgo Giltro Kencoro Gumanty, Usman Halauddin Halauddin Hana Raihana Hardiansa, Debi Hardiansyah, Debi Hardianza, Meno Harlianto, Budi Helinnes, Putri Herliana Herliana Hesna Nurliana Hilmi Zakarya Hudayat, Nurul Humairah, Fadillah Ikhlas Fadli, Darmawan Isfardian Agustin Awaliyah Julia Inti Sari Kamila, Nur Husniatin Khairul Amri Kirbani Sri Brotopuspito Kirbani Sri Brotopuspito Larang, Miranda Puspa Lindung Zalbuin Mase, Lindung Zalbuin Lizalidiawati Lizalidiawati Lusi Puspita Sari M Farid M. Dahlan M. Farid, M. Maghribi, Faritz Bagda Malik Krisbudianto Marzuki Marzuki Melly Angglena Misliniyati, Rena Mohtar Mohtar Muammar, Zaky Muchammad Farid Muchammad Farid Muchammad Farid Muhammad Farid Muhammad Farid Natasya, Indah Dwi Novtrisa, Indri Nur Husniatin Kamila Nurul Hudayat Nurwijayanti Paisal Edo Putri, Aisyah Cindy Phylia Putri, Elona Gita Gatra Rabbani, Muhammad Rifqi Rafly, Tegar Al Rahmat Al-Ansory, Andre Rahmawati, Nurul 'Ilmi Rahmawati, Nurul Ilmi Raihana, Hana Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon, Refrizon Refrizon, Refrizon Rida Samdara Rida Samdara Sapanur, Destika Meisy Saragih, Ronni Samuel Sari, Julia Inti Sari, Julia Inti Sari, Lusi Puspita Sesilia, Tiara Siagian, Samuel Suhendra Suhendra Suhendra Suhendra Sumanjaya, Erlan - Sumariyah Sumariyah Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Sya’adah, Isni Taufiqurrahman Syah, Muhammad Wahyudi Wahyudi Wahyudi Wahyudi Yuni Setyowati