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All Journal POSITRON Jurnal Neutrino : jurnal fisika dan aplikasinya Journal of Degraded and Mining Lands Management Phi : Jurnal Pendidikan Fisika dan Terapan JGE (Jurnal Geofisika Eksplorasi) Jurnal Geosaintek Jurnal Fisika FLUX Journal of Geoscience, Engineering, Environment, and Technology JTERA (Jurnal Teknologi Rekayasa) Spektra: Jurnal Fisika dan Aplikasinya Jurnal Geosains dan Teknologi Journal of Multidisciplinary Academic Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Indonesian Journal of Innovation and Applied Sciences (IJIAS) Jurnal Abdi Masyarakat Indonesia Journal of Innovation Research and Knowledge Jurnal Geosaintek Global Review of Tourism and Social Sciences
Antosia, Risky Martin
Department Of Geophysical Engineering, Faculty Of Industrial Technology, Sumatera Institute Of Technology
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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Soil characterization for seismic vulnerability and preliminary subsidence assessment based on microtremor analysis in Sukarame District, Bandar Lampung Antosia, Risky Martin; Endryanti, Windy Meylana; Farduwin, Alhada; Rizki, Reza; Styawan, Yudha
Journal of Degraded and Mining Lands Management Vol. 13 No. 3 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.133.10439

Abstract

This research estimated soil properties and land stability in Sukarame District, Bandar Lampung, using multi-parameter microtremor-derived H/V spectral ratio (HVSR) values and spaceborne InSAR deformation data. The study area is mainly composed of unconsolidated Quaternary volcanic deposits with an average natural frequency ( ) of about 2 Hz and a moderate amplification factor ( ) value of 4. Such parameters, together with an average seismic vulnerability index ( ), of 11s strongly point to substantial impedance contrasts in the sediments and a large overall sediment thickness. To validate the physical effects of these features, a Multi-Temporal InSAR analysis was applied using satellite observations. Results showed a strong land subsidence rate, with a difference in distance from the satellites up to -25 cm for certain sectors. Spatially problematic zoning corresponded to the area with higher near-surface stiffness (  ranges of 400-470 m/s) along the territories with large subsidence rates. This relationship showed that higher.  and shallow material solidness are not sufficient conditions for stability against vertical deformation (also referred to as settlement), as substantial consolidation is likely to result from the significant load applied to the soil and groundwater extraction due to population pressure in these urban areas. These results highlight that  must be used with caution and interpreted in conjunction with geodetic data for an integrated stability analysis. This integrated model is useful as a general guideline for land stability management, infrastructure hazard preparedness, and disaster-resilient spatial planning in the rapidly developing Sukarame District.
Aquifer Assessment in the Capit Urang Tourist Area, Metro City: A Vertical Electrical Sounding Approach Josua Nico Batistuta Sihombing; Kemas Daffa Hendriyastama; Andreas Sipahutar; Risky Martin Antosia
Spektra: Jurnal Fisika dan Aplikasinya Vol. 11 No. 1 (2026): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 11 Issue 1, April 2026
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.111.01

Abstract

This study was conducted in the Capit Urang Tourist Area, Metro City, which is surrounded by rivers and faces problems with turbid well water that cannot be directly used. The research aims to identify subsurface conditions, especially aquifer thickness and depth, and to evaluate the possibility of deeper aquifers with better water quality. The Vertical Electrical Sounding (VES) method with a Schlumberger array was applied at six sounding points with a maximum AB/2 spacing of 100 m. Data were acquired using a Naniura resistivity meter, processed into apparent resistivity, and inverted with IPI2Win software. The results indicate four main subsurface layers with a resistivity pattern of ρ₁ < ρ₂ > ρ₃ < ρ₄. The first layer has a resistivity of 50–150 Ωm and is interpreted as topsoil with a thickness of less than 1.5 m. The second layer has a resistivity of 300–400 Ωm and is interpreted as gravel to a depth of about 6 m. The third layer, with resistivity of 40–70 Ωm, is interpreted as sandstone functioning as an aquifer with a thickness of 10–13 m to a depth of roughly 16 m. The fourth layer, with resistivity of 160–650 Ωm, is interpreted as impermeable bedrock. The aquifer is influenced by river infiltration, leading to turbid groundwater, while the limited electrode span prevented detection of deeper aquifers. Based on lithological interpretation, the aquifer system is classified as an unconfined to semi-unconfined aquifer. These findings provide a scientific basis for groundwater management and for future hydrogeophysical and hydrochemical investigations to improve water-supply sustainability in the Capit Urang Tourist Area.
Identifikasi Akuifer dan Estimasi Volume Air Tanah di Kecamatan Tempilang, Kabupaten Bangka Barat, Kepulauan Bangka Belitung, untuk Mendukung Kebutuhan Air Tanah pada Perkebunan Kelapa Sawit Menggunakan Metode Geolistrik Shan Muhammad Akhtar; lan Darma Syahputra; Risky Martin Antosia; Acep Ruchimat
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 1 (2026): Februari
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i1.1641

Abstract

This study aims to identify aquifer characteristics and estimate groundwater volume in Tempilang District, West Bangka Regency, to support water demand resulting from oil palm plantation activities. The method applied was the geoelectrical Vertical Electrical Sounding (VES) using the Schlumberger configuration at ten measurement points, consisting of six points within the Alluvium Formation (Qa) and four points within the Tanjung Genting Formation (TRt). Apparent resistivity data were processed using least-square inversion with IPI2WIN software to obtain true resistivity values, which were subsequently interpreted through correlation with borehole data and previous studies. The results indicate that the main aquifer within the Alluvium Formation is developed in sand layers with varying thicknesses, approximately 32 m in the southern zone, 21 m in the central zone, and 36 m in the northern zone, with an average thickness of 27.5 m. Based on the Alluvium Formation area of 7,884 ha, the aquifer volume is estimated to reach 2.145 × 10⁹ m³. Assuming an effective porosity of 15%, the theoretical exploitable groundwater volume is approximately 3.21 × 10⁸ m³. This estimation suggests that the groundwater potential in Tempilang District is theoretically sufficient to meet the water demand of oil palm plantations; however, its utilization requires sustainable management.
Identifikasi Mineralisasi Sulfida Menggunakan Metode Geolistrik 2D Resistivitas dan Induced Polarization (IP) Daerah Vulkanik Tolitoli, Sulawesi Tengah Farah Dhiba; Amelia Oryza Sativa; Risky Martin Antosia; Nur Hidayat
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 1 (2026): Februari
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i1.1671

Abstract

This study aims to identify indications of sulfide mineralization in the volcanic area of Tolitoli, Central Sulawesi, using two-dimensional (2D) geoelectrical resistivity and Induced Polarization (IP) methods. Data acquisition was carried out along ten survey lines using the Wenner–Schlumberger configuration, which were divided into two observation areas. The resistivity inversion results show relatively high values, generally exceeding 1000 Ωm, interpreted as massive and relatively fresh volcanic rocks such as andesite and basalt. Nevertheless, the Induced Polarization data reveal zones with moderate to high chargeability values (40–60 ms), indicating the presence of disseminated sulfide minerals, particularly pyrite, within the volcanic rocks. The chargeability anomalies are locally developed and are generally associated with fracture zones and geological structures that act as pathways for hydrothermal fluid migration. The most prominent prospective zones for sulfide mineralization were identified along survey lines 3 and 6. The integration of resistivity and IP methods is proven to be effective in identifying indications of sulfide mineralization in complex volcanic environments, even within high-resistivity rocks, and provides a preliminary assessment of subsurface mineralization potential in the Tolitoli area.
APLIKASI VERTICAL ELECTRICAL SOUNDING DALAM MENGIDENTIFIKASI LAPISAN ANDESIT PADA JALAN INSINYUR SUTAMI BANDAR LAMPUNG Vigorous Raido; Muhammad Al Fiqri Idham; Risky Martin Antosia
Journal of Innovation Research and Knowledge Vol. 5 No. 8 (2026): Januari 2026
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk menginterpretasikan kondisi bawah permukaan dan menentukan sebaran serta ketebalan batuan andesit menggunakan metode Vertical Electrical Sounding (VES). Pengukuran dilakukan pada lima titik sounding (TG-01 hingga TG-05) dengan memanfaatkan variasi nilai tahanan jenis untuk mengidentifikasi perubahan litologi secara vertikal. Hasil pemodelan menunjukkan nilai RMS Error antara 1,1% hingga 4,7%, yang mengindikasikan kualitas interpretasi yang baik. Interpretasi geolistrik menunjukkan bahwa kondisi bawah permukaan umumnya tersusun atas tiga lapisan utama, yaitu tanah penutup, batuan andesit, serta tufa andesit atau breksi andesit. Lapisan tanah penutup memiliki ketebalan dangkal pada kedalaman 0–3 meter dengan nilai resistivitas 70–321 Ωm. Lapisan andesit teridentifikasi secara konsisten pada lapisan kedua dengan nilai resistivitas relatif tinggi, berkisar antara 386–667 Ωm, dan muncul pada kedalaman sekitar 3 meter hingga lebih dari 40 meter. Batuan andesit menunjukkan keterusan secara geologi dan berpotensi sebagai batuan dasar. Metode VES terbukti efektif dalam menggambarkan kondisi bawah permukaan dan mendukung identifikasi batuan andesit di area penelitian.
Geodiversity and Geoheritage Potential of Basalt Caves in Girimulyo Village, East Lampung, Indonesia: A Mixed-Method Assessment Approach Bilal Al Farishi; Syifa Faranabila; Gilbert Prima; Zatalini Syadni Rahadian; Happy Christin Natalia; Nono Agus Santoso; Risky Martin Antosia
Global Review of Tourism and Social Sciences Vol. 1 No. 2 (2025): Global Review of Tourism and Social Sciences
Publisher : Yayasan Ghalih Pelopor Pendidikan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/grtss.v1i2.351

Abstract

This study evaluates the geodiversity and geoheritage potential of basalt caves in Girimulyo Village, East Lampung, Indonesia, focusing on scientific, educational, tourism, and degradation risk values. Eight caves, including Pandan 1, Pandan 2, Kelelawar, and Kubah, were assessed through field observations, stakeholder interviews, and visual documentation. Pandan 1 Cave demonstrated the highest potential with an average score of 281.67, attributed to its unique geological features, including A’a lava, pahoehoe lava, and bread crust textures. Kelelawar Cave’s biodiversity, particularly its bat habitat, highlights its suitability for ecotourism, while Kubah Cave attracts adventure tourists with its columnar joint formations. Jagung Cave was identified as the most vulnerable to degradation, scoring 295 due to agricultural activities nearby. Conservation measures, visitor management, and sustainable tourism practices are essential to protect these geoheritage sites. Recommendations include developing visitor pathways, educational tours, and geotourism infrastructure. Limitations include reliance on visual assessments for degradation risk and limited cave access. Future research should include geotechnical analysis and explore the socio-economic impact of geotourism on local communities. The findings provide a framework for sustainable geotourism, balancing conservation, education, and tourism growth.
Mapping Land Subsidence Zones Around Subsurface Water Channels Using 2D Electrical Resistivity Tomography in Bandung Putra, Rio Restu; Antosia, Risky Martin; Junian, Wahyu Eko; Ruchimat, Acep
Jurnal Phi: Kurnal Pendidikan Fisika & Terapan Vol 13 No 1 (2027)
Publisher : Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/

Abstract

Recurring ground subsidence around the Cikapayang River channel, particularly in the vicinity of the Bandung City Groundwater and Environmental Geology Center (PATGTL), has become a significant geotechnical issue. These incidents are believed to be triggered by poorly compacted fill layers, which allow intense infiltration of rainwater into the soil pores. This increase in pore water content causes a significant increase in the unit weight of the soil. It imposes additional loads on the underlying layers, which ultimately increases the risk of land subsidence. This study aims to identify the occurrence of renewed subsidence around the current subsidence zone using the 2D electrical resistivity method with the Wenner-Schlumberger configuration. Measurements were conducted along five transects, each 52 meters long, with a 1-meter electrode spacing. The data were processed using Res2dinv; subsequently, all transects were merged and visualized using Leapfrog Geo, and synthetic modeling was performed via Res2dmod to verify the results. The results of the study showed resistivity values ranging from 4.86 to 339 Ωm. Low resistivity values (4–30 Ωm) were interpreted as water-saturated clay fill layers, whereas high resistivity values (>101 Ωm) indicated the presence of voids and subsurface water-channel structures. Subsidence zones were identified in four sections in the central area, while a potential new subsidence zone at a depth of 1 meter was detected in the outermost section. This study demonstrates that the 2D electrical resistivity method is effective for detecting areas prone to subsidence and can serve as a basis for mitigation and infrastructure planning in urban areas at risk of subsidence.
Co-Authors Acep Ruchimat Aganda, Riyanto Dedinta Akbar, Hendra Hidayat Amelia Oryza Sativa Anas Fauzi Masykuri Andreas Maruli Pakpahan Andreas Sipahutar Andri Yadi Paembonan Angga Jati Widiyatama Asido Saputra Sigalingging Bilal Al Farishi Depri Dimas Setiawan Dimas Setiawan Ekawati, Gestin Mey Endryanti, Windy Meylana Erlangga, Mokhammad Puput Farah Dhiba Farduwin, Alhada Farishi, Bilal Al Gilbert Prima Habib Mustofa Hissy Ijitiha Sari Hita Kirana Intan Adiani Putri Irawati, Selvi Misna Irawati, Selvi Misnia Josua Nico Batistuta Sihombing Junian, Wahyu Eko Kemas Daffa Hendriyastama Khoiriyyah, Alfi lan Darma Syahputra M Ilham Pratama Muhammad Al Fiqri Idham Mulyana, Galang Dwi Natalia, Fransiska Natalia, Happy Christin Nathania, Edlyn Yoadan Naufal, Rifqi Andi Nugraha, Purwaditya Nugroho Prasetyo Nur Hidayat Octafiani, Aulia Pakpahan, Andreas Maruli Purwaditya Nugraha Putra, Rio Restu Putri, Intan Andriani Putri, Uci Amelia Putu Pradnya Andika Raga Mandala Putra Rahmadani, Putri Amindar Ramdan, Muhammad Reza Rizki Reza Rizki Rhahmi Adni Pesma Rizki Wulandari Rizki, Reza Ruchimat, Acep Ruhul Firdaus Santoso, Nono Agus Sari, Hissy Ijitiha Shan Muhammad Akhtar Sillak Hasiany Syafitri, Meta Nisrina Syifa Faranabila Vigorous Raido Yudha Styawan Zatalini Syadni Rahadian