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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 Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Jurnal Fisika FLUX Jurnal Geocelebes Journal of Geoscience, Engineering, Environment, and Technology 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 Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Indonesian Journal on Geoscience Indonesian Journal of Community Empowerment and Service J-ABDIPAMAS (Jurnal Pengabdian Kepada Masyarakat) Jurnal Meteorologi dan Geofisika
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 Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Training on the Utilization of the HVSR Geophysical Method Based on the Concept of Mechanical Wave Propagation for Earthquake Hazard Potential Analysis in Kuto Rejo Village Hadi, Arif Ismul; Refrizon; Muda Lubis, Ashar; Johan, Septi; Halauddin
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 5 No. 2 (2025): December 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/icomes.v5i2.45281

Abstract

Kepahiang Regency has a high potential for earthquake hazards. This is because the Kepahiang area is located in the subduction zone of the Indo-Australian tectonic plate movement in the ocean and the movement of the Musi segment of the Sumatra fault on land as the main fault. As an area with high earthquake hazard potential and its location near the Musi segment fault, efforts are needed to reduce the risk of disasters due to earthquakes through the activity "Training on the Utilization of the Horizontal to Vertical Spectral Ratio (HVSR) Geophysical Method”. The HVSR method is a geophysical method based on the concept of mechanical wave propagation. HVSR measurements can be used to understand the structural properties of subsurface. The target audience for this activity is Village Apparatus and Residents of Kuto Rejo Village, Kepahiang Regency. This activity aims to provide an understanding of the basic concepts of mechanical wave propagation in rocks and provide training in the use of the HVSR method. The method used is through the stages of focus group discussion (FGD), field data acquisition, processing, interpretation and evaluation. The indicator of the achievement of the objectives of this activity is if each activity participant can acquisition, process, analyze, and interpret and answer the questionnaire related to the community service material correctly. The results of this activity provide insight into the importance of local wisdom-based earthquake hazard mitigation for disaster risk reduction. Village Apparatus and Residents of Kuto Rejo Village will continuously share their knowledge with other villagers from this activity.
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.
Micro-Zonation Mapping of Landslide Potential Using Statistical Weighting Method of Analytical Hierarchy Process (AHP) in South Bengkulu–Lahat Road for Disaster Mitigation Arif Ismul Hadi; Budi Harlianto; Nurul Hudayat; M. Farid; Frinsyah Virgo; Darmawan Ikhlas Fadli; Fadillah Humairah
Jurnal Penelitian Pendidikan IPA Vol 11 No 2 (2025): February
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i2.9915

Abstract

The research objective was to identify areas with high, medium, and low potential for landslides by micro-zonation on the South Bengkulu–Lahat road, map areas with potential for landslides based on the parameters that contribute to causing landslides using the AHP method, and determine the parameters for landslides, the dominant parameter affecting the occurrence of landslides in the study area. To achieve the research objectives, all parameters that cause landslides obtained at measurement points are then overlaid using the AHP statistical weighting method. The results showed that the area along the South Bengkulu–Lahat road had been identified microzoning high, medium, and low landslide potentials based on statistical weighting from parameters were obtained at the measurement points. For areas with high landslide potential, caution should be exercised, especially during the rainy season with high intensity and long duration.
Studi Mikrozonasi Kerentanan Seismik dan Bangunan Bertingkat Menggunakan Metode HVSR (Horizontal to Vertical Spectral Ratio) di Kabupaten Bengkulu Selatan Indri Novtrisa; Lindung Zalbuin Mase; Refrizon Refrizon; Rena Misliniyati; Khairul Amri; Arif Ismul Hadi; Darmawan Ikhlas Fadli
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 Sebaran Peak Ground Acceleration (PGA) Menggunakan Data Mikrotremor di Sekitar Danau Ranau Kabupaten Lampung Barat Gede Oktiana; Arif Ismul Hadi; Muchammad Farid; Efmadani; Gita Panny Nababan; Sefti Dewi Sari; Yola Dwi Ramadhani
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 2 (2026): May
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i2.1755

Abstract

West Lampung Regency is located within an active tectonic zone associated with the Sumatra Fault system and is therefore vulnerable to significant earthquake ground shaking. This study aims to identify the spatial distribution of Peak Ground Acceleration (PGA) based on local site characteristics derived from microtremor measurements. Microtremor data were recorded at distributed observation points and analyzed using the HVSR method to determine the dominant frequency (f₀) and amplification factor (A₀) of the soil. The results indicate that f₀ values range from 0.544 to 15.1 Hz, while A₀ values vary between 1.66 and 8.57, reflecting heterogeneous subsurface conditions. These parameters were used to estimate PGA, which ranges from 0.105 to 0.565 g across the study area. Higher PGA values are generally associated with areas characterized by lower dominant frequencies and higher amplification, indicating thicker or softer sediment layers. The resulting PGA distribution map reveals zones with relatively higher seismic response potential. These findings demonstrate the importance of site-specific dynamic characterization in seismic hazard assessment and provide essential information for earthquake risk mitigation and regional development planning in West Lampung Regency.
Subsurface Structure Analysis Using HVSR Inversion in the Musi Ujan Mas Kepahiang Hydroelectric Area Shalzabilla Umini Annaqsyabandi; Refrizon Refrizon; Arif Ismul Hadi; Muhammad Najib Syami Muqtadir; Hilmi Zakariya
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 12 No 1 (2026): January-June
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v12i1.11154

Abstract

Bengkulu Province is characterized by high seismic activity due to the convergence of the Indo-Australian and Eurasian plates and the presence of the active Musi Segment of the Sumatra Fault. These tectonic conditions make Kepahiang Regency particularly susceptible to shallow earthquakes, highlighting the importance of subsurface characterization for critical infrastructure such as the Musi Ujan Mas Hydroelectric Power Plant. This study aims to investigate subsurface characteristics around the hydropower plant area using microtremor measurements analyzed through the Horizontal to Vertical Spectral Ratio (HVSR) method and HVSR inversion. A total of 40 measurement points were acquired using a PASI Gemini 2 portable seismograph with a sampling frequency of 200 Hz. HVSR analysis was conducted to determine the dominant frequency (f₀), amplification factor (A₀), and seismic vulnerability index (Kg), while inversion of HVSR curves using Dinver software was applied to estimate shear-wave velocity (Vs) profiles and   values. The results show that f₀ ranges from 1,21 to 5,77 Hz, with dominant low-frequency values indicating thick and soft sediment layers. Amplification factors vary between 1,46 and 15,01, while Kg values suggest that a large portion of the area is highly vulnerable to seismic effects.   values range from 213,26 to 508,88 m/s, corresponding to soil classes C and B based on UBC and EC8 classifications. These findings indicate significant subsurface heterogeneity and identify areas prone to seismic amplification, providing important information for seismic hazard assessment and infrastructure planning.
Analisis Struktur Bawah Permukaan menggunakan Data Satelit Gravitasi GGMPlus di Pulau Enggano, Bengkulu Utara Provinsi Bengkulu Muhammad Deni Apriyanto; Refrizon Refrizon; Arif Ismul Hadi; Laura Nurul Aprilia Simamora; Siti Herfina Anjani
Jurnal Fisika Unand Vol 15 No 4 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.4.345-354.2026

Abstract

This study aims to identify subsurface structures and rock type in Enggano Island, North Bengkulu, using GGMPlus satellite graity data. The methods applied include the calculation of ABL with SRTM2gravity topographic correction, spectral analysis to estimate anomaly depth, and separation of regional and residual anomalies using the moving average method. Furthermore, two-dimensional modelling was conducted to obtain subsurface density distribution. The results show that the ABL values range from -20 mGal to 80 mGal, with low anomalies dominating the northern part and gradually increasing towards the south. Spectral analysis indicates that the average depth of regional anomalies is approximately 1875.7 m, while residual anomalies are about 123.27 m. The interpretation reveals that the northern area is dominated by low-density rocks, whereas the central to Southern parts are characterized by high-density rocks. The 2D modelling suggest the presence of sedimentary rocks, limestone, and igneous rocks (mafic intrusions), as well as fault structures or basin boundaries in the study area.
Interpretasi Tingkat Kekerasan Batuan Bawah Permukaan di Daerah Rawan Gempa Bumi Kota Bengkulu Arif Ismul Hadi; Refrizon Refrizon; Halauddin Halauddin; Liza Lidiawati; Paisal Edo
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 11, No 1 (2021): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v11i1.46525

Abstract

Bengkulu City is located in the subduction zone of the Indo-Australian and Eurasian plates, so it is prone to earthquake. To anticipate the impact of earthquake, disaster mitigation can be carried out, one of which is a study of the level of rock hardness in the area. This study aims to determine the level of rock hardness based on seismic wave velocity in several rock formations and to determine which rock formations have the potential to cause vulnerability to earthquakes. Field data acquisition uses the seismic refraction method with time-term inversion technique. The data obtained in the field are processed to obtain a 2-D cross-section of the subsurface seismic wave velocity values. The study results show that the level of rock hardness depends on the type of rock formation. The Andesite Rock Formation Unit (Tpan) has the highest level of hardness, while the transitional area between the Alluvium Rock Formation Unit (Qa) and the Swamp Sedimentary Rock Formation Unit (Qs) has the lowest level of hardness.
Subsurface Characterization Based on Shear Wave Velocity for Site Classification in Earthquake Mitigation Efforts in Muara Bangkahulu clora ulandari; Refrizon Refrizon; Halauddin Halauddin; Arif Ismul Hadi; Hana Raihana; Mesi Prasisilia; Nurul Apriyanti; Sefti Dewi Sari; Yola Dwi Rahmadhani
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 12, No 2 (2026)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/gravity.v12i2.38503

Abstract

Muara Bangkahulu District, Bengkulu City, is a coastal area located in an active seismic zone due to the influence of the Sumatra Subduction Zone and the Sumatra Fault. The geological conditions, which are dominated by alluvial sediments and swamp deposits, have the potential to increase earthquake wave amplification, thus requiring a study of subsurface characteristics as a basis for disaster mitigation. This study aims to identify variations in shear wave velocity (Vs30) and determine soil site classification based on the SNI 1726:2019 standard. The method used is Multichannel Analysis of Surface Waves (MASW) at ten measurement points with a track length of 50 m. The data were processed through Rayleigh wave dispersion analysis and inversion to obtain a one-dimensional (1D) model, then integrated with two-dimension al (2D) modeling to describe subsurface lateral variations. The results of the study show that the Vs30 value ranges from 137 to 450 m/s, which is divided into SE, SD, and SC site classes. The coastal area is dominated by soft to medium soil with high seismic amplification potential, while the central to eastern parts show denser and more stable soil conditions. The integration of 1D and 2D models shows a heterogeneous subsurface structure both vertically and laterally. In conclusion, the MASW method is effective in technical considerations for seismic hazard assessment, determining construction priorities, and planning foundations that are more adaptive to local soil conditions in the coastal area of Bengkulu City.
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 clora ulandari Darmawan Ikhlas Fadli Darmawan Ikhlas Fadli Darmawan Ikhlas Fadli Efmadani Efriyadi Efriyadi Elfi Yuliza Fadillah Humairah Fadli, Darmawan Ikhlas Falenia, Felly Farid, Muchammad Farid, Muhammad Febri Adrianto Adrianto Frinsyah Virgo Gede Oktiana Giltro Kencoro Gita Panny Nababan Gumanty, Usman Halauddin Halauddin Halauddin Halauddin Halauddin Hana Raihana Hana Raihana Hardiansa, Debi Hardiansyah, Debi Hardianza, Meno Harlianto, Budi Helinnes, Putri Herliana Herliana Hesna Nurliana Hilmi Zakariya Hilmi Zakarya Ikhlas Fadli, Darmawan Indri Novtrisa Insani, Redha Radiatul Isfardian Agustin Awaliyah Johan, Septi Julia Inti Sari Kamila, Nur Husniatin Khairul Amri Kirbani Sri Brotopuspito Kirbani Sri Brotopuspito Larang, Miranda Puspa Laura Nurul Aprilia Simamora Lindung Zalbuin Mase Lizalidiawati Lizalidiawati Lusi Puspita Sari M Farid M. Dahlan M. Farid Maghribi, Faritz Bagda Malik Krisbudianto Marzuki Marzuki Melly Angglena Mesi Prasisilia Mohtar Mohtar Muammar, Zaky Muda Lubis, Ashar Muhammad Deni Apriyanto Muhammad Farid Muhammad Farid Muhammad Farid Muhammad Najib Syami Muqtadir Natasya, Indah Dwi Nur Husniatin Kamila Nurul Apriyanti Nurul Hudayat Nurul Hudayat 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 Rena Misliniyati Rida Samdara Rida Samdara Sapanur, Destika Meisy Saragih, Ronni Samuel Sari, Julia Inti Sari, Julia Inti Sari, Lusi Puspita Sefti Dewi Sari Sefti Dewi Sari Sesilia, Tiara Shalzabilla Umini Annaqsyabandi Siti Herfina Anjani Suhendra Suhendra Suhendra Suhendra Sukatin, Sukatin Sumanjaya, Erlan - Sumariyah Sumariyah Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Sya’adah, Isni Taufiqurrahman Syah, Muhammad Wahyudi Wahyudi Wahyudi Wahyudi Yola Dwi Rahmadhani Yola Dwi Ramadhani Yudhi Harini Bertham, Yudhi Harini Yuni Setyowati Zulfia Memi Mayasari