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All Journal BULETIN OSEANOGRAFI MARINA IJOG : Indonesian Journal on Geoscience JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Jurnal Fisika FLUX Jurnal Geocelebes Journal of Geoscience, Engineering, Environment, and Technology JKTP: Jurnal Kajian Teknologi Pendidikan Spektra: Jurnal Fisika dan Aplikasinya Buletin Sumber Daya Geologi PENDIPA Journal of Science Education Jurnal Ilmu Fisika Jurnal Pendidikan Fisika dan Teknologi Indonesian Physical Review Kasuari: Physics Education Journal (KPEJ) Jurnal Kumparan Fisika Jurnal Pengabdian Al-Ikhlas Best Journal (Biology Education, Sains and Technology) Indonesian Journal on Geoscience Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Indonesian Journal on Geoscience Jurnal Multidisiplin Madani (MUDIMA) JoS ( Journal of International Relations) Fokus Abdimas Jurnal Meteorologi dan Geofisika Jurnal Geosaintek
Farid, Muchammad
Universitas Bengkulu
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Analysis of Potential New Flood Basin in Ratu Agung Sub-district Using the HVSR Method Apriana, Yelda; Refrizon; Farid, Muchammad; Onawa, Jonah; Hardianza, Meno; Setyowati, Yuni; Verentina, Sendiya
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 3 (2025): JGEET Vol 10 No 03 : September (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.3.22541

Abstract

Indonesia is a tropical country with high rainfall and diverse topography, making it prone to flooding. In Bengkulu City, the flood risk is particularly high in low-lying and flood basins, which are critical zones for flood risk mitigation. This study aims to analyze the characteristics of rock types and water infiltration potential that may  trigger new flood basins in Ratu Agung District, Bengkulu City. The microtremor method was applied to assess soil  properties based on the dominant frequency (f0), amplification factor (A0), and sediment layer thickness. The analysis showed (f0) values ranging from 1.13 to 8.55 Hz and (A0) values ranging from 0.74 to 4.59. HV-Inv analysis results indicate shear wave velocity Vs values between 53 and 894 m/s, with five sediment layers reaching a depth of 100 m. Higher Vs values generally represent denser, less porous rock, limiting infiltration and increasing surface runoff, which elevates flood potential. The findings of this study are expected to serve as a reference for flood risk mitigation, especially in minimizing infrastructure damage and social impacts in Bengkulu City.
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.
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.
Uji Aktivitas Antikolestrol Ekstrak Etanol 96% Daun Salam (Syzygium polyanthum) Terhadap Kelinci Jantan (Oryctolagus cuniculus) Rifa Rihadatul Aisy; Muchammad Farid; Putri Mulia; Rose Intan Perma Sari; Tika Hardini
BEST Journal (Biology Education, Sains and Technology) Vol 9, No 1 (2026): Juni 2026
Publisher : Program Studi Pendidikan Biologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/best.v9i1.13404

Abstract

Kolesterol merupakan senyawa lipid amfipatik sekaligus komponen esensial pada membran sel dan lipoprotein plasma. Daun salam (Syzygium polyanthum) mengandung senyawa aktif flavonoid, tanin, dan saponin yang berpotensi sebagai agen antikolesterolemia melalui penghambatan sintesis kolesterol dan peningkatan metabolisme lipid. Penelitian ini bertujuan untuk mengetahui aktivitas antikolesterol ekstrak etanol daun salam serta menentukan dosis yang paling efektif. Metode penelitian menggunakan rancangan eksperimental terhadap lima ekor kelinci jantan yang dibagi menjadi lima kelompok: kontrol normal, kontrol positif (simvastatin), kontrol negatif (Na-CMC 1%), serta dua kelompok perlakuan ekstrak daun salam (dosis 156 mg dan 312 mg). Kondisi hiperkolesterolemia diinduksi menggunakan pakan tinggi lemak, dan seluruh perlakuan diberikan secara oral. Hasil penelitian menunjukkan persentase penurunan kadar kolesterol berturut-turut adalah 0,0% (normal), 29,9% (kontrol positif), 6,5% (kontrol negatif), 27,1% (dosis 156 mg), dan 39,2% (dosis 312 mg). Dapat disimpulkan bahwa ekstrak etanol daun salam pada dosis 312 mg memberikan efek paling optimal dalam menurunkan kadar kolesterol pada kelinci jantan, bahkan melampaui efektivitas kontrol positif.
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.
Uji Aktivitas Antikolestrol Ekstrak Etanol 96% Daun Salam (Syzygium polyanthum) Terhadap Kelinci Jantan (Oryctolagus cuniculus) Rifa Rihadatul Aisy; Muchammad Farid; Putri Mulia; Rose Intan Perma Sari; Tika Hardini
BEST Journal (Biology Education, Sains and Technology) Vol 9, No 1 (2026): Juni 2026
Publisher : Program Studi Pendidikan Biologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/best.v9i1.13404

Abstract

Kolesterol merupakan senyawa lipid amfipatik sekaligus komponen esensial pada membran sel dan lipoprotein plasma. Daun salam (Syzygium polyanthum) mengandung senyawa aktif flavonoid, tanin, dan saponin yang berpotensi sebagai agen antikolesterolemia melalui penghambatan sintesis kolesterol dan peningkatan metabolisme lipid. Penelitian ini bertujuan untuk mengetahui aktivitas antikolesterol ekstrak etanol daun salam serta menentukan dosis yang paling efektif. Metode penelitian menggunakan rancangan eksperimental terhadap lima ekor kelinci jantan yang dibagi menjadi lima kelompok: kontrol normal, kontrol positif (simvastatin), kontrol negatif (Na-CMC 1%), serta dua kelompok perlakuan ekstrak daun salam (dosis 156 mg dan 312 mg). Kondisi hiperkolesterolemia diinduksi menggunakan pakan tinggi lemak, dan seluruh perlakuan diberikan secara oral. Hasil penelitian menunjukkan persentase penurunan kadar kolesterol berturut-turut adalah 0,0% (normal), 29,9% (kontrol positif), 6,5% (kontrol negatif), 27,1% (dosis 156 mg), dan 39,2% (dosis 312 mg). Dapat disimpulkan bahwa ekstrak etanol daun salam pada dosis 312 mg memberikan efek paling optimal dalam menurunkan kadar kolesterol pada kelinci jantan, bahkan melampaui efektivitas kontrol positif.
3D MODELING AND DERIVATIVE ANALYSIS OF THE KETAHUN SEGMENT BASED ON GGMPLUS AND SRTM2 DATA FOR DISASTER MITIGATION Clora Ulandari; Halauddin Halauddin; Refrizon Refrizon; Hilmi Zakariya; Suhendra Suhendra; Muchammad Farid; Alda Sulistiani; Hana Raihana; Nurul Apriyanti
Jurnal Geosaintek Vol. 12 No. 2 (2026)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v12i2.9106

Abstract

interaction between the Sumatra subduction zone and the Sumatra Fault, resulting in high seismic activity. One of the important segments with the potential to cause earthquakes is the Ketahun Segment in Lebong Regency, Bengkulu Province. This study aims to map the three-dimensional (3D) fault structure and identify lithological density contrasts to support disaster mitigation efforts. The methods used include processing GGMPlus and SRTM2gravity satellite gravity data, complete Bouguer correction, regional-residual anomaly separation, first horizontal derivative (FHD) and second vertical derivative (SVD) analysis, and 3D inversion modeling using Grav3D software. The CBA analysis results show anomaly values of –8 to 50 mGal with sharp gradations indicating the presence of major fault structures. SVD and FHD analyses show the dominance of dip-slip faults with significant density contrasts. The 3D inversion modeling shows a density range of 1.02–3.52 g/cm³ with an average value of 2.27 g/cm³, where the low-density zone is at a shallow depth (0–1500 m) and the high-density zone is at a depth of 500–2000 m. The sharp boundary between the two zones indicates an active fault plane at a depth of 1000–2500 m. These findings provide a more representative picture of the fault geometry and can be used as a basis for developing earthquake mitigation strategies and spatial planning based on actual geological conditions in the Bengkulu region.
Co-Authors Afrizal Mayub Afrizal Mayub Afrizal Mayub Agung Sedayu Al Ansory, Andre Rahmat Al-Ansory, Andre Rahmat Alda Sulistiani Ambarwati Anggi, Arya Putra Apriana, Yelda Arif Ismul Hadi Budiyanto Budiyanto Cariti Dassa Urra Clora Ulandari Darmawan Ikhlas Fadli Deassy Siska Della Zakia Soleha Efmadani Efmadani Eko Swistoro Gea, Jessica Agnes Soroinama Gede Oktiana Giltro Kencoro Gita Panny Nababan Gumanty, Usman Halauddin Halauddin Hana Raihana Hardiansa, Debi Hardiansyah, Debi Hardianza, Meno Harlianto, Budi Hasugian, Basdiki Hasugian, Basdikki Helinnes, Putri Helmy Fitriawan Helmy Fitriawan Henny Johan Hilmi Zakariya Insani, Redha Radiatul Julia Inti Sari Junnah, Azima Raudhalia Kurnia Lestari M. Lutfi Firdaus Maesaroh, Rina Maesaroh, Rina Maesaroh Malik Krisbudianto Mayub, Afrizal Mei Indrawati, Mei Muammar, Zaky Naldo, Asrol Nanang Sugianto Nandi Haerudin Nirwana Nurul Apriyanti Nurul Hudayat Onawa, Jonah Prasetyo, Kobin Putri Mulia R Rustadi Rabbani, Muhammad Rifqi Rahmat Al-Ansory, Andre Rahmawati, Nur Shafira Rahmawati, Nurul Ilmi Raihana, Hana Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon, Refizon Refrizon, Refrizon Refrizon, Refrizon Revika Julia Pratiwi Rifa Rihadatul Aisy Riska Marwanti Rose Intan Perma Sari Rustadi Rustadi Sari, Julia Inti Sari, Julia Inti Sefti Dewi Sari Sesilia, Tiara Setiawan, Randy Putra Sholeha, Della Zakia Siswanti, Liza Alif Suhendra Suhendra Suhendra Suhendra Sumajaya, Erlan Susilaningsih Susilaningsih, Susilaningsih Sutijo Joko Sudiro Suwarsono Suwarsono Taufiqurrahman Syah, Muhammad Tika Hardini Umaya Umaya, Umaya Umi kalsum Verentina, Sendiya Wardana, Rendy Wikrama Yerry Soepriyanto Yola Dwi Ramadhani Yuni Setyowati Yurilla Endah Muliatie, Yurilla Endah