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All Journal IJOG : Indonesian Journal on Geoscience Journal of Geoscience, Engineering, Environment, and Technology Journal of Applied Geospatial Information
Simanjuntak, Andrean V. H.
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Physics

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The Needs of Public Health Mitigation as The Impact of Earthquake Disasters in North Sulawesi Region, Indonesia Lamonge, Annastasia S. Lamonge; Polii, Grace B; Laka, Angela A. M. L; Simanjuntak, Andrean V. H.; Tangkulung, Glatio G; Timbuleng, Jesicca V. D; Anggriani, Theresia; Lewi Ristiyono
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 04 (2024): JGEET Vol 09 No 04 : December (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.04.19452

Abstract

North Sulawesi is located on a megathrust system and is very vulnerable to destructive earthquake events. Therefore, disaster mitigation from a health perspective must be carried out. Good knowledge will shape a positive attitude as a response that will determine actions in providing effective and optimal health services during a disaster. However, so far, the level of knowledge, attitudes, and actions of doctors in community health centers in North Sulawesi in facing disasters has never been evaluated, so the readiness of doctors in community health centers in facing disasters is still not well understood. One of the effects after a disaster is kidney failure (CKD) due to the lack of fluids needed by the body, making it one of the unavoidable effects of a disaster. Chronic Kidney Disease (CKD) is one of the diseases whose number and prevalence are significant both globally, nationally, and locally in North Sulawesi. The purpose of this research is to: 1) explore the perceptions and experiences of the community regarding the risk factors for CKD, 2) develop and test the effectiveness of a disaster-based education program in increasing community knowledge about CKD prevention. The design used is a multistage mixed method. The research began with the collection of qualitative data through in-depth interviews, followed by the development of an educational program and the experimental testing of the educational program. This research was conducted in Kuwil Village, North Minahasa Regency. A total of 15 participants were involved in the interviews and 38 participants in the experimental phase. Qualitative data is analyzed thematically, while quantitative data is analyzed descriptively through comparison. The results of the qualitative analysis yielded 2 themes. The first theme is the disparity in public knowledge about CKD, and the second theme is the public's efficacy regarding the prevention and impact of CKD. The analysis results using the paired t-test obtained a p-value of 0.000, which means that the disaster-based education program is effective in increasing public knowledge about CKD and its prevention. Having sufficient knowledge and adequate sources of information can help the community in making healthy lifestyle choices, especially in preventing the occurrence of CKD. Disaster-based education programs can be one of the approaches that community health centers can take to improve public literacy regarding CKD prevention.
An updated 1-dimensional seismic velocity model has been developed for the Mw 6.1 Pasaman earthquake that occurred on February 25, 2022 Sihotang, Bertalina; Humaidi, Syahrul; Simanjuntak, Andrean V. H.
Journal of Applied Geospatial Information Vol. 8 No. 1 (2024): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v8i1.7593

Abstract

On February 25, 2022, a strong-felt earthquake with magnitude Mw 6.1 occured within the western portion of Pasaman, West Sumatra, Indonesia. The impact of the seismic activities has produced an enormous shaking which measured as VI on the Adjusted Mercalli Concentrated (MMI) and II -III MMI until Malaysian and Singapore region. The casualty's reports contain the data approximately the broadly harms such as, 1765 residences and murdered at slightest 18 individuals in West Sumatra Area. A dependable dynamic blame was already unidentified and raise a major address almost the association with Sumatra dynamic blame. Therefore, this analysis examines the attributes of seismic activity and the damage caused by utilizing an appropriate 1-Dimensional seismic velocity model. The acquired 1-Dimensional speed data exhibits varying values at a depth of 10 km with a velocity of approximately 5.5 km/s and at 30 km with a velocity of approximately 7 km/s. The 1-D velocity obtained exhibits a parallel and distinctive pattern with an RMS value of less than 1.0. In addition, the PGA records reveal a seismic intensity of 10% in Pasaman, consistent with the damage reports obtained during field assessments. This indicates that Pasaman is located in a zone with frequent seismic activity.
Design and Performance Evaluation of a 200 Wp Off-Grid Solar Photovoltaic Module for Renewable Energy in Indonesia Sitorus, Nobert; Ginting, Berta Br.; Panjaitan, Berman P.; Simanjuntak, Benrad E.; Naibaho, Penteris R. P.; Matondang, Aprima A.; Simanjuntak, Andrean V. H.
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.2025.10.3.24981

Abstract

The rapid growth of global energy demand and the urgent need to reduce greenhouse gas emissions have accelerated the transition toward renewable energy technologies, with solar photovoltaic (PV) systems playing a central role. In Indonesia, high solar irradiation provides significant potential for PV adoption, yet challenges remain in human resource capacity and technical readiness, particularly in rural areas where off-grid systems are critical. This study presents the design, development, and testing of a 200 Wp off-grid PV training module aimed at bridging the gap between theoretical knowledge and practical skills in renewable energy education. The module integrates two 100 Wp PV panels, a 100 Ah lithium-ion battery, an MPPT charge controller, and a 500 W pure sine wave inverter, all mounted on a modular acrylic platform to enable repeated assembly and disassembly for training purposes. Experimental testing under tropical conditions demonstrated stable PV output (Voc 19.8–21.5 V, Isc 4.8–5.4 A), efficient battery charging within 8 hours to full capacity, and reliable discharging performance sustaining DC loads for 18 hours and AC loads for 12–14 hours. Inverter efficiency averaged 92%, with minimal waveform distortion under typical loads. These results confirm the module’s reliability and educational value, offering a robust platform for vocational training and community-based capacity building. The study contributes to Indonesia’s renewable energy transition and supports Sustainable Development Goal 7 by enhancing technical education and workforce readiness for solar PV deployment.
Analysis of Stress Ratio and Stress Regime in West Java Sirait, Anne M.; Palgunadi, Kadek Hendrawan; Simanjuntak, Andrean V. H.; Rahmania, Nadhira; Naufal, Izaaz; Dhiarofa, Muhammad Nanda Rizqi; Karimah, Akhlaqul; Al-Ghifari, Rafi Sadam; Ramadhani, Azhari; Hady, Farrastha Hady; Warnana, Dwa Desa; Suryanto, Wiwit
Indonesian Journal on Geoscience Vol. 13 No. 1 (2026)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.13.1.43-55

Abstract

This study actively investigates stress ratios, principal stress orientations, and stress regimes in the West Java Province, Indonesia, by simultaneously inverting both the stress tensor and fault orientations from 232 moment tensors. It identifies diverse stress regimes, including normal and reverse faulting in the subduction zone, as well as mixed reverse and strike-slip faults across the island. Stress ratios range from 0.08 to 0.97. Sedimentary basins in the northeast produce lower values, while tectonic forces near the southern subduction zones generate higher values. In the subduction zone, plate bending generates normal faulting, while compressional forces lead to reverse faulting. The fore-arc region exhibits a variety of regimes: normal, reverse, and strike-slip, indicating transitions in the dynamics of subduction. Across the island, a combination of reverse and strike-slip faulting suggests crustal compression, with Mount Anak Krakatau exhibiting evidence of normal faulting. The study uncovers a complex interplay of subduction processes, crustal deformation, and geological heterogeneities. It outlines stress regimes ranging from normal and reverse faulting in the subduction zone to mixed reverse and strike-slip faulting on the island. These findings offer crucial insights into the tectonic processes shaping West Java, and lay the groundwork for more informed seismic hazard assessments and risk mitigation strategies.
Co-Authors Al-Ghifari, Rafi Sadam Angela Alfonsin Maria Lusia Laka Anggriani, Theresia Aprima Matondang Berman Panjaitan Dhiarofa, Muhammad Nanda Rizqi Dwa Desa Warnana Ginting, Berta Br. Grace, Polii Benedikta Hady, Farrastha Hady KARIMAH, AKHLAQUL Lamonge, Annastasia S. Lewi Ristiyono Naibaho, Penteris Rumissar P Naufal, Izaaz Nobert Sitorus Palgunadi, Kadek Hendrawan Rahmania, Nadhira Ramadhani, Azhari Sihotang, Bertalina simanjuntak, benrad edwin Sirait, Anne M. Suryanto, Wiwit Syahrul Humaidi, Syahrul Tangkulung, Glatio G Timbuleng, Jesicca V. D