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All Journal POSITRON IJOG : Indonesian Journal on Geoscience JGE (Jurnal Geofisika Eksplorasi) Jurnal Geosaintek Jurnal Geocelebes Journal of Geoscience, Engineering, Environment, and Technology Indonesian Physical Review Indonesian Journal on Geoscience Indonesian Journal on Geoscience Jurnal Abdi Masyarakat Indonesia Jurnal Geosaintek Global Review of Tourism and Social Sciences
Santoso, Nono Agus
Geophysical Engineering, Institut Teknologi Sumatera; South Lampung, Indonesia
Humanities Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Physics Public Health Social Sciences

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Beneath the Surface: Identifying Subsurface Caves in "Gua Pandan" Using Integrated Electrical Profiling Method Antosia, Risky Martin; Akbar, Hendra Hidayat; Santoso, Nono Agus; Putri, Intan Andriani; Farishi, Bilal Al; Natalia, Happy Christin
POSITRON Vol 13, No 1 (2023): Vol. 13 No. 1 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v13i1.63558

Abstract

One of the geopark tourism areas in East Lampung Regency, "Gua Pandan," has run into rock subsidence on the surface. As part of the subsidence prevention, indirect electrical methods between resistivity and chargeability profiling were applied to identify the presence of a subsurface cave in the study area. Two measurement lines were carried out with Wenner Alpha and Wenner Schlumberger arrays. Because the depth target is shallow (approximately 10 m) and to obtain a better resolution, each line has a stretch length of 70 m and 2 m electrode spacing. A line was measured over a known underground cave to produce a desired outcome, and the other was in an area with no cavities. Based on the results from each profile of resistivity and chargeability, an air-filled target has a value of over 5,000  and under 6 ms, respectively. Then, integrated processing of both methods generated a metal factor (MF) profile to view the presence and estimated shape of the cave/ cavities. The result represents that an MF value under 1.5 ms/Ωm is a cavity, and solid rock is over 1.5 ms/Ωm. Also, the MF level from both configurations delineates a similar section. However, a modest difference occurs in estimating the cavity shape geometry,  for Wenner Apha and  for Wenner Schlumberger. Furthermore, this study can be an initial step in safety assessment in the area.
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.
STRATIGRAFI SUSEPTIBILITAS MAGNETIK SINGKAPAN EMBUNG E SEBAGAI ACUAN INTERPRETASI BAWAH PERMUKAAN DI INSTITUT TEKNOLOGI SUMATERA Santoso, Nono Agus; Pascaloa, M Rafif; Zaenudin, Ahmad
Jurnal Geosaintek Vol. 8 No. 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

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

Abstract

Reference in interpretation is very important. We cannot always rely on the Telford table because each region has different physical parameters. The purpose of this study was to create a magnetic susceptibility stratigraphy of the Embung E outcrop with the hope that it could be used as a reference for subsurface interpretation at the Sumatran Institute of Technology (ITERA). The results obtained that the Embung E outcrop has a magnetic susceptibility stratigraphy consisting of soil, tuff and tuffan clay. Sequentially the magnetic susceptibility of the soil is about 5 – 90 × 10-8m3/kg, tuff is about 1-10 × 10-8m3/kg and the tuff clay is about 5 – 80 × 10-8m3/kg. This result can be used as a reference for interpretation because it has been correlated with geological observations of rocks in the field.
Geodiversity and Geoheritage Potential of Basalt Caves in Girimulyo Village, East Lampung, Indonesia: A Mixed-Method Assessment Approach Al Farishi, Bilal; Faranabila, Syifa; Prima, Gilbert; Rahadian, Zatalini Syadni; Natalia, Happy Christin; Santoso, Nono Agus; Antosia, Risky Martin
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.
INTEGRATED GEOPHYSICAL AND GEOTECHNICAL ANALYSIS TO SUBSURFACE LITHOLOGY OVERVIEW AT ITERA DORMITORY SITE, LAMPUNG, INDONESIA Santoso, Nono Agus; Irwanto, Prastowo Adhi; Syuhada, Syahidus
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.488

Abstract

The Student Dormitory is a gathering place for most new students at ITERA. For disaster mitigation, it is necessary to conduct geophysical and geotechnical surveys. Geophysical and geotechnical surveys are conducted to describe the subsurface lithology. The purpose of this study is to identify the subsurface of the Dormitory building so that it can be determined which buildings have the potential for geological hazards. The methods used are geomagnetic, geoelectric and geotechnical methods. The results obtained are that High and low magnetic anomalies are related to the thickness of the lithology. This is also justified by the results of geoelectric using resistivity cross-sections. The thickness of this lithology is related to the level of building security. TB4 has the highest security based on magnetic and geoelectric data. Meanwhile, TB1 has the lowest security based on subsurface conditions.
MULTIMETHOD APPROACH TO THE STUDY OF SUBSURFACE IN MERAK BATIN HOT SPRING, NATAR, LAMPUNG Santoso, Nono Agus; Junian, Wahyu Eko; Ramayanti, Fitria; Rizki, Reza; Alawiyah, Susanti
Jurnal Geosaintek Vol. 11 No. 1 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v11i1.3023

Abstract

Merak Batin Natar hot spring is a geothermal manifestation located far (16 km) from the nearest volcanic edifice and thus is of local scientific interest. The driver of this hot spring has never studied in detail, and whether this system links to the distant volcanic body is an open question. The purpose of this study was to obtain a subsurface model of the Natar hot spring. The method used is a combination of magnetic, geoelectric and geochemical methods. Based on the results of the study, it was found that the subsurface model of the Natar hot spring consists of an unaltered and altered zone. This hot spring belongs to the outflow zone, so it is natural to be in the lowlands and far from the volcano.
Co-Authors Aganda, Riyanto Dedinta Ahmad Zaenuddin Ahmad Zaenudin Akbar, Hendra Hidayat Al Farishi, Bilal Andreas Maruli Pakpahan Andri Yadi Paembonan Angga Jati Widiyatama Antosia, Risky Martin Bilal Al Farishi Depri Ekawati, Gestin Mey Faranabila, Syifa Farduwin, Alhada Farishi, Bilal Al Felik Destian Putra Amijaya Hissy Ijitiha Sari Hita Kirana Iqbal, Mochamad Irawati, Selvi Misnia Irwanto, Prastowo Adhi Junian, Wahyu Eko Kadja, Grandprix Thomryes Marth M Rafif Pascaloa Natalia, Happy Christin Naufal, Rifqi Andi Nugraha, Purwaditya Octafiani, Aulia Pakpahan, Andreas Maruli Pascaloa, M Rafif Prima, Gilbert Purwaditya Nugraha Putri, Intan Andriani Rahadian, Zatalini Syadni Ramayanti, Fitria Rendra Aditya Hakim Reza Rizki Rizki, Reza Ruhul Firdaus Sari, Hissy Ijitiha Susanti Alawiyah Syahidus Syuhada Virgian Rahmanda Wijayanti Ashuri