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All Journal Jurnal Geocelebes Jurnal Teras Fisika : Teori, Modeling, dan Aplikasi Fisika Journal of Environment and Geography Education
Fista, Aksela Dian
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Earth & Planetary Sciences Education Environmental Science Materials Science & Nanotechnology

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Pemisahan Anomali Gayaberat Regional dan Residual Menggunakan Metode Gaussian Low Pass Filter pada Daerah Potensi Panas Bumi Way Ratai Lampung Agustian, Rizki Buana; Amanda, Anisa; Fista, Aksela Dian; Dani, Ilham
Jurnal Teras Fisika: Teori, Modeling, dan Aplikasi Fisika Vol 8 No 2 (2025): Jurnal Teras Fisika: Teori, Modeling, dan Aplikasi Fisika
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jtf.2025.8.2.16700

Abstract

This study aims to separate regional and residual components from complete Bouguer anomaly data using the Gaussian Low Pass Filter method in the geothermal prospect area of Way Ratai, Lampung. Spectral analysis was applied to determine the optimal cutoff frequency that distinguishes regional, residual, and noise components. The spectrum analysis identified three linear segments with R² values of 0.8332 (regional), 0.9655 (residual), and 0.9518 (noise), supporting the accuracy of the segmentation. The complete Bouguer anomaly map displays a decreasing gravity trend towards the northeast, indicating large-scale subsurface density variations. After filtering, the regional anomaly map shows smooth contours reflecting broader geological structures, while the residual anomaly map reveals sharper local features such as faults and fractures, which are potential geothermal fluid pathways. These results demonstrate the effectiveness of the Gaussian Low Pass Filter in enhancing geophysical resolution and geological interpretation for geothermal exploration.
A spatial and SWOT approach to earthquake mitigation strategy Hadizar, M. Roja Nabil; Fista, Aksela Dian; Amelia, Virna; Prayoga, M. Fahry; Haerudin, Nandi; Mulyasari, Rahmi; Catur, Rahmat; Karyanto
Journal of Environment and Geography Education Vol. 2 No. 2: (August) 2025
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/jegeo.v2i2.2025.2026

Abstract

Background: Bandar Lampung is situated in a seismically active region influenced by the subduction of the Indo-Australian and Eurasian plates, which increases its susceptibility to earthquake hazards. This study aims to evaluate the level of earthquake vulnerability and formulate appropriate mitigation strategies using a spatial and SWOT-based approach. Methods: The methods applied include historical earthquake data analysis, hazard zone mapping, spatial analysis through Geographic Information Systems (GIS), and a review of existing disaster mitigation policies. Findings: The results indicate that during March 2024, 146 earthquake events were recorded, of which 135 were shallow (<60 km) and mainly concentrated in the subduction zone southwest of Lampung. Vulnerability and population density mapping further identified Kedaton, Rajabasa, and Tanjung Karang Pusat as high-risk districts. Conclusion: Based on these findings, recommended mitigation strategies include the enforcement of earthquake-resistant building codes, integration of risk-based considerations into spatial planning, the development of public education and awareness programs, and the strengthening of early warning systems. The study highlights that a spatially informed and policy-oriented approach can effectively reduce the potential impacts of earthquakes and enhance community resilience in Bandar Lampung City. Novelty/Originality of this article: The novelty lies in combining spatial analysis, vulnerability mapping, and a SWOT-based policy framework to produce integrated and location-specific earthquake mitigation strategies for Bandar Lampung City.
Identification of Magma Intrusion Distribution in the Sekincau Mountain Area Based on the Euler Deconvolution Method of Gravity Data: Application of Gravity-Based Euler Deconvolution for Intrusive Mapping Amanda, Anisa; Agustian, Rizki Buana; Fista, Aksela Dian; Dani, Ilham
JURNAL GEOCELEBES Vol. 10 No. 1: April 2026
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/geocelebes.v10i1.49005

Abstract

Mount Sekincau, West Lampung, is located within the active Bukit Barisan tectonic zone and exhibits geothermal potential controlled by magmatic activity and geological structures. This study aims to identify the distribution and depth of magmatic intrusions using gravity data analysis and Euler deconvolution. GGMPlus satellite gravity data were processed to generate Complete Bouguer Anomaly, regional and residual anomalies, analytical signal, Euler solutions, and three-dimensional models. The Complete Bouguer Anomaly values range from 38.05 to 58.32 mGal, with high anomalies concentrated in the central part of the study area. Positive residual anomalies ranging from 0.88 to 2.78 mGal indicate the presence of shallow high-density bodies interpreted as magmatic intrusions. Analytical signal and Euler deconvolution results with a structural index of 0 reveal clusters of shallow sources associated with fault zones. Three-dimensional modeling confirms a southeastward-oriented intrusive body. These results indicate that shallow magmatic intrusions act as the primary heat source of the Sekincau geothermal system.
Co-Authors Agustian, Rizki Buana Amanda, Anisa Amelia, Virna Catur, Rahmat Dani, Ilham Hadizar, M. Roja Nabil Karyanto Mulyasari, Rahmi Nandi Haerudin Prayoga, M. Fahry