Article Per Year (5 Year)
p-Index From 2021 - 2026
3.51
P-Index
This Author published in this journals
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

Published : 27 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 27 Documents
Search

 1   2   3 
A COMBINED METHOD OF 1D AND 2D RESISTIVITY FOR GROUNDWATER LAYER ESTIMATION AT A FARMING AREA IN REJOMULYO VILLAGE Antosia, Risky Martin; Ramdan, Muhammad
Spektra: Jurnal Fisika dan Aplikasinya Vol. 8 No. 1 (2023): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 8 Issue 1, April 2023
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.081.04

Abstract

The groundwater depends on when it is available, more in the rainy and less in the dry seasons. Fluctuation in water availability is a significant problem in activities continuously requiring large amounts of water, such as agriculture. Hence, it is necessary to increase the number of water resources to meet the community's needs. Therefore, the groundwater layer zone was estimated as an initial study at the dry farmland in Rejomulyo village, Jati Agung district, South Lampung, using a combined method between the 1D resistivity method of the Schlumberger array and the 2D form of the Wenner configuration. Each sounding point and the 2D line have a maximum stretch length of 300 m. The 1D outcome correlates to the 2D data processing result to produce a subsurface lithology model. As a result, the research area has three primary layers with three rock types. The first layer has a resistivity value of less than 20 Ωm and is identified as tuffaceous clay. Then the second layer with a resistivity range of 60–66 Ωm is tuffaceous sand, this rock which is referred to as the groundwater layer with a depth of 11-40 m. The last layer has a high resistivity value of 120–141 Ωm as tuff. Based on the results of 3D visualization, the groundwater layer in the study area spreads to the southeast with a confined aquifer type. This targeted rock layer can be utilized for groundwater production.
Analysis of Subsidence Hazards in Pandan Cave Area, Giri Mulyo Village, Marga Sekampung District, East Lampung using Analytical Hierarchy Process Bilal Al Farishi; Natalia, Happy Christin; Naufal, Rifqi Andi; Aganda, Riyanto Dedinta; Octafiani, Aulia; Hita Kirana; Depri; Pakpahan, Andreas Maruli; Sari, Hissy Ijitiha; Santoso, Nono Agus; Antosia, Risky Martin; Putri, Intan Andriani
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 2 (2024): JGEET Vol 09 No 02 : June (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.2.16848

Abstract

Pandan Cave is a basalt lava cave which is a unique geological tourism area located in Giri Mulyo Village, Marga Sekampung District, East Lampung Regency, Lampung Province. This cave was formed when the lava flow cooled at the top because it was in contact with the cold atmosphere, while at the bottom it was still flowing. This uniqueness caused Pandan Cave to become one of the tourist attractions that was once crowded with tourists. However, the condition of this cave is still very natural which can lead to the risk of geological disasters such as subsidence which can endanger tourists, so it is necessary to research to minimize the occurrence of geological disasters in the area. This research was conducted by observing aerial photographs, collecting data directly in the field, and then processing it with the Analytical Hierarchy Process (AHP). Parameters used in this AHP method include lithology, vegetation, weathering, rock mass class, and cave roof thickness. The existence of subsidence in the study area is influenced by weathering (34%), vegetation (31%), thickness of the cave roof layer (16%), lithology (10%), and rock mass class (9%). Based on the overlay results for each parameter that has been weighted, the Pandan Cave tourism area is divided into three subsidence hazard zone classifications, that is low hazard zone with value of 0.28-0.44, medium hazard zone with range of 0.44-0.60, and high hazard zone with range of 0.60-0.75. Through the Analytical Hierarchy Process (AHP) method and overlay of each parameter used, the distribution of subsidence hazard zones in the study area was obtained.  The low threat zone of 27.57 ha is about 57.07% of the total research area, the medium threat zone is 15.86 ha or about 32.83% of the total research area, and the high threat zone is 4.88 ha or about 10. 10% of the total research area.
Pemanfaatan Instrumen PQWT dalam Pendugaan Air Tanah di Desa Gayau, Kabupaten Pesawaran, Provinsi Lampung Antosia, Risky Martin; Putri, Intan Andriani; Farduwin, Alhada; Santoso, Nono Agus; Irawati, Selvi Misnia; Nugraha, Purwaditya
Jurnal Abdi Masyarakat Indonesia Vol 4 No 4 (2024): JAMSI - Juli 2024
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.1296

Abstract

Desa Gayau, Kabupaten Pesawaran, memiliki permasalahan bahwa sumur air tanah yang terdapat pada fasilitas air desa cepat mengalami kekeringan, padahal sumur tersebut memiliki kedalaman 80 m. Tim dari program studi Teknik Geofisika, Institut Teknologi Sumatera, telah melaksanakan kegiatan pengabdian kepada masyarakat (PkM) pertama pada pertengahan tahun 2021 menggunakan metode geolistrik/ resistivitas. Namun, hasilnya belum dapat memberikan kejelasan mengapa sumur cepat kering. Kemudian, pada tahun 2022, tim melakukan kembali program PkM yang kedua untuk mengonfirmasi hasil kegiatan yang pertama sekaligus memberikan penjelasan kondisi lapisan air tanah di sekitar area fasilitas air desa. Pengkajiannya dengan menerapkan metode elektromagnetik pasif yang terintegrasi dengan pengolahan data secara otomatis, yang disebut dengan alat PQWT. Pengukuran dilakukan di sekitar fasilitas air desa untuk mengkaji ulang ketersediaan air tanah. Keluaran dari alat tersebut memberikan informasi hingga kedalaman 150 m dan memperlihatkan bahwa lapisan batuan yang mengandung air hanya sampai 30 m saja, tidak ada indikasi keberadaan air tanah pada kedalaman sumur yang sudah ada. Tim PkM tidak merekomendasikan penggunaan dalam jangka panjang bagi warga desa karena kemungkinan besar keberadaan air tanah pada sumur tersebut bergantung pada musim. Tim juga menyarankan mencari lokasi lain di sekitar desa untuk memperoleh lapisan air tanah yang lebih dalam yang tidak terpengaruh oleh musim dan juga menentukan titik baru dalam pembuatan sumur bor.
Analisis Metode Geolistrik 2D dan VLF-EM untuk Mendeteksi Jalur Air Panas Desa Jatimulyo, Kecamatan Jati Agung, Kabupaten Lampung Selatan Putri, Uci Amelia; Paembonan, Andri Yadi; Antosia, Risky Martin; Irawati, Selvi Misna
Jurnal Geosains dan Teknologi Vol 7, No 1 (2024): April 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jgt.7.1.2024.9-18

Abstract

Indonesia terletak pada pertemuan tiga Lempeng Tektonik yang merupakan zona rawan terjadinya letusan gunung api dan gempa tektonik sehingga banyak terdapat sumber daya panas bumi. Pada daerah penelitian Desa Jatimulyo terdapat manifestasi panas bumi berupa air panas, untuk itu perlu dilakukan survey geofisika berupa Metode Geolistrik 2D dan Metode Very Low Frequency Electromagnetic (VLF-EM) yang bertujuan untuk memodelkan litologi bawah permukaan dan mendeteksi patahan sebagai jalur keluar air panas. Metode Geolistrik 2D dilakukan dengan menginjeksi arus listrik ke bawah permukaan bumi sehingga beda potensial terukur dan didapatkan nilai resistivitas. Metode VLF-EM dapat mendeteksi arah dan posisi patahan dengan memanfaatkan frekuensi gelombang elektromagnetik yang rendah sehingga penetrasi kedalaman lebih dalam dibandingkan metode geolistrik 2D. Kedua metode dikorelasikan sehingga terdapat empat jenis litologi batuan pada daerah penelitian, nilai resistivitas 1Ωm – 22Ωm merupakan lempung tufan, nilai resistivitas 23Ωm – 80Ωm merupakan pasir tufan, nilai resistivitas 23Ωm – 310Ωm merupakan top soil dan nilai resistivitas 81Ωm – 688Ωm merupakan batuan beku. Pada hasil pemodelan terdapat patahan dengan arah baratlaut-tenggara dan timurlaut-baratdaya yang menjadi jalur keluarnya air panas kepermukaan.
IDENTIFIKASI PERSEBARAN BATUAN ANDESIT SEBAGAI BAHAN UTAMA AGREGAT MENGGUNAKAN METODE GEOLISTRIK PROFILING KONFIGURASI WENNER-ALPHA Setiawan, Dimas; Antosia, Risky Martin; Nugraha, Purwaditya
Jurnal Geosaintek Vol. 9 No. 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

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

Abstract

Analisis Variasi Spasial a- dan b-Value Sebagai Indikator Kegempaan di Wilayah Nusa Tenggara bagian Timur Rahmadani, Putri Amindar; Risky Martin Antosia; Anas Fauzi Masykuri; Putu Pradnya Andika
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 6 No. 4 (2025): November
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v6i4.1382

Abstract

Eastern Nusa Tenggara, encompassing Timor, Flores, Alor, and Kupang City, lies along the active collision zone between the Indo-Australian and Eurasian plates, making the region highly susceptible to earthquakes. This study analyzes the spatial variation of a-value and b-value based on the earthquake catalog from 1998–2023 using ZMAP v.6.0 software. The frequency–magnitude distribution (FMD) curve indicates an inverse relationship between earthquake frequency and magnitude. Spatially, relatively high b-values are observed in eastern Flores to Alor, indicating frequent seismic activity with low released energy, while the variation of a-value reflects the level of seismicity, ranging from 5.0–6.0, with b-values between 0.8–1.1. These findings provide valuable insights for disaster mitigation, infrastructure planning, and enhancing community preparedness in Eastern Nusa Tenggara, including Kupang City.
Soft Layer Identification in Kedamaian District Using the HVSR-Derived Shear Wave Velocity Distribution Mulyana, Galang Dwi; Antosia, Risky Martin; Nathania, Edlyn Yoadan
Journal of Geoscience, Engineering, Environment, and Technology Vol. 11 No. 1 (2026): JGEET Vol 11 No 01 : March (2026)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2026.11.1.25294

Abstract

The Kedamaian District in Bandar Lampung City is a densely populated urban area characterized by complex geological settings that are highly susceptible to seismic amplification and geotechnical hazards. Despite its vulnerability, high-resolution characterization of subsurface soft soil deposits in this specific district remains underexplored. The study aims to evaluate local site effects for designing seismic-resistant infrastructures and mitigating geotechnical hazards. This study attempts to locate and determine the characteristics of soft soil deposits in the Kedamaian District, Bandar Lampung City, by means of the HVSR method (Horizontal to Vertical Spectral Ratio) based on the shear wave velocity distribution result. Microtremor measurements were taken from 37 points and processed to estimate the amplification factor (A0), dominant frequency of soil deposit (f0), and seismic vulnerability index (Kg). HVSR inversion used the Particle Swarm Optimization (PSO) to propose average shear wave velocity down to 30 m depth (VS30). Analysis indicated that the amplification values range from 2.31 to 9.11, with most values falling within a moderate level, indicating a moderate local site response. Dominant frequencies range from 0.63 to 18.76 Hz, and higher f0 values are characteristic of more compact and/or complex rock formations, whilst lower f0 values correspond to thicker sediments. Values of the seismic vulnerability index range from 0.48 to 119.24 s, with most sites showing a high seismic vulnerability related to the combined effect of high amplification and low dominant frequency. The distribution suggests that the study region consists predominantly of soft soils (type E) with VS30 ranging from 80.9 to 132.6 m/s, interspersed with medium soils (type D) and less abundant hard rocks (type C). The results show that the Kedamaian is primarily covered with soft sediment formations, which have the potential to enhance strong ground motion during seismic events, as well as for a geotechnical investigation database and hazard assessment of earthquake activities and urban development within the region.
Mapping of soil vulnerability to earthquake using the HVSR method in microtremor measurements in Marga Agung Area, South Lampung Regency Natalia, Fransiska; Khoiriyyah, Alfi; Syafitri, Meta Nisrina; Antosia, Risky Martin
Indonesian Journal of Innovation and Applied Sciences (IJIAS) Vol. 6 No. 1 (2026): February-May
Publisher : CV. Literasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47540/ijias.v6i1.2706

Abstract

This study was conducted in Marga Agung Village, Jati Agung Subdistrict, South Lampung Regency, using the Horizontal to Vertical Spectral Ratio (HVSR) method based on microtremor data. This study aims to analyze the characteristics of the subsurface layers and determine the soil vulnerability level in Marga Agung Village, through soil vulnerability zoning mapping based on the natural frequency (f0), amplification factor (A0), seismic vulnerability index (Kg), and shear wave velocity to a depth 30 meters (Vs30), and examined the potential level of building damage as a basis for earthquake disaster mitigation efforts. The results show that f0 values range from 0.31 Hz to 27.96 Hz,  A0 values range from 1.59 to 5.10, and Kg values range from 0.15 to 53.45, dominated by low seismic vulnerability index values. Vs30 values are dominated by stiff soil (Type D) and very dense and soft rock (Type C), with a range from 191.05 to 440.85 m/s. This indicates that most of Marga Agung Village has relatively low soil vulnerability to earthquake ground shaking.
SEISMICITY ANALYSIS ON SULAWESI REGION BASED ON a- AND b-VALUES FOR THE PERIOD 1976–2024 Risky Martin Antosia; Raga Mandala Putra; Rizki Wulandari; Reza Rizki; Asido Saputra Sigalingging; Nugroho Prasetyo
Jurnal Neutrino:Jurnal Fisika dan Aplikasinya Vol 18, No 2 (2026): APRIL
Publisher : Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/neu.v18i2.36788

Abstract

Seismicity analysis is an essential approach to understanding earthquake occurrence patterns, seismic activity levels, and the potential for large-magnitude earthquakes. This study aims to analyze seismicity parameters in the Sulawesi region using earthquake data from 1976 to 2024 obtained from the United States Geological Survey (USGS). The parameters examined include a-value and b-value derived from the frequency-magnitude distribution (FMD) curve using the ZMAP software. The results show that seismic activity in Sulawesi is dominated by earthquakes of magnitude 4–5 with depths of less than 100 km. The magnitude of completeness (M_c) is determined as 4.5, with an a-value of 6.39 (equivalent to 4.7 per year) and a b-value of 0.831. Spatial maps indicate that high a-values (4) are concentrated in West and Central Sulawesi, while high b-values (0.55) are also clustered in these regions. These findings highlight that West and Central Sulawesi are characterized by dense seismic activity and heterogeneous crustal stress conditions. This study provides a valuable contribution by complementing seismicity parameter information in Sulawesi, particularly in previously uncovered areas, and serves as a basis for earthquake hazard mitigation efforts.
Identifikasi Zona Lemah Penyebab Amblesan Menggunakan Metode Geolistrik Resistivitas 2D dan Data N-SPT di Wilayah Jakarta Pusat dan Selatan M Ilham Pratama; Habib Mustofa; Risky Martin Antosia; Nur Hidayat
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 23, No 1 (2026): 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.v23i1.24831

Abstract

Penelitian ini dilakukan untuk mengidentifikasi potensi amblesan tanah di wilayah Jakarta Pusat dan Jakarta Selatan menggunakan metode geolistrik resistivitas 2D dan data uji Standard Penetration Test (SPT). Data yang digunakan terdiri atas delapan lintasan geolistrik dan tiga titik bor SPT. Pengukuran geolistrik dilakukan menggunakan konfigurasi Wenner-Alpha dengan panjang lintasan 235 m dan spasi elektroda 5 m. Proses inversi menggunakan RES2DINV menghasilkan model resistivitas 0,5–200 Ωm dengan kedalaman penetrasi 35–45 m dan nilai RMSE <7%. Korelasi resistivitas dan N-SPT dianalisis pada setiap kedalaman untuk mengidentifikasi karakter lapisan dan menentukan zona lemah. Hasil penelitian menunjukkan bahwa zona lemah hanya muncul pada Area A (SPT-01) di kedalaman 6–21 m, ditandai oleh resistivitas rendah (3,5–8 Ωm) dan nilai N-SPT sangat rendah (0–4), yang mengindikasikan lapisan tuf pasiran hingga material berbutir halus yang sangat lunak, jenuh air, dan berplastisitas tinggi. Sebaliknya, Area B (SPT-02 dan SPT-03) tidak menunjukkan indikasi zona lemah karena nilai N-SPT relatif tinggi dan stabil pada sebagian besar kedalaman, meskipun resistivitas bervariasi. Kondisi ini menunjukkan bahwa lapisan tanah pada Area B lebih kompak, keras, dan aman terhadap risiko amblesan. Secara keseluruhan, potensi amblesan hanya terkonsentrasi pada Area A, sementara kedua titik lainnya berada dalam kondisi geoteknik yang stabil
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