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All Journal Novum : Jurnal Hukum Jurnal Inovasi Pendidikan Kimia JGE (Jurnal Geofisika Eksplorasi) Syntax Literate: Jurnal Ilmiah Indonesia Spektra: Jurnal Fisika dan Aplikasinya JOURNAL OF SCIENCE AND SOCIAL RESEARCH CERIA (Cerdas Energik Responsif Inovatif Adaptif) Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Jumat Pertanian: Jurnal Pengabdian Masyarakat Journal Of Human And Education (JAHE) Jurnal Pemberdayaan Sosial dan Teknologi Masyarakat Jurnal Penelitian Ilmu Pendidikan Indonesia Women Midwives and Midwifery IRA Jurnal Pengabdian Kepada Masyarakat Jurnal Kefarmasian Indonesia
Rizki Wulandari
Jurusan Kimia FM/PA Universitas Negeri Semarang Gedung 06 lantai 2, Kampus Sekaran Gunungpati, Semarang, 50229, Telp. (024)8508035
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Analisis Kerentanan Tanah Terhadap Gempa Bumi Menggunakan Metode Horizontal to Vertical Spectral Ratio di Daerah Way Huwi, Lampung Selatan Sitio, Angelica Noviani; Wulandari, Rizki; Irawati, Selvi Misnia; Sinuhaji, Dwi Putri Meisya br
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.v7i1.1562

Abstract

This study aims to evaluate the level of soil seismic vulnerability in Way Huwi Village, South Lampung, using the Horizontal to Vertical Spectral Ratio (HVSR) method. The analysis was conducted based on parameters including natural frequency, soil amplification factor, seismic vulnerability index, and shear-wave velocity to a depth of 30 m (V_S30). The results indicate that the subsurface conditions of the study area are heterogeneous, as reflected by the spatial variation of HVSR parameters across the area. Areas characterized by low natural frequency (f₀ < 5 Hz) and high amplification factor (A₀ > 3.5) are generally associated with thick, unconsolidated soft sediments, resulting in higher seismic vulnerability. In contrast, areas with higher V_S30 values indicate stiffer and more compact soil conditions, leading to a more stable ground response to earthquake shaking. V_S30 estimation using Particle Swarm Optimization (PSO) and Genetic Algorithm (GA) methods produced consistent results, where lower V_S30 values correlate with increased amplification factors and seismic vulnerability indices. Based on these findings, areas with high seismic vulnerability, particularly around measurement points SS2, SS10, and SS22, are recommended as priority zones for earthquake risk mitigation efforts. The results of this study are expected to serve as a basis for spatial planning, earthquake-resistant building design, and disaster risk management in Way Huwi Village.
Integrating Time-Dependent and Time-Independent Earthquake Recurrence Models for Fault-Based Seismic Hazard Assessment in the Lampung Region, Southern Sumatra Wulandari, Rizki; Styawan, Yudha; Prabowo, Satria Bagus
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.111.05

Abstract

The Lampung region in southern Sumatra is exposed to significant seismic hazard due to its proximity to the Sunda megathrust and multiple active crustal faults. This study integrates time-independent (Poissonian) and time-dependent (Brownian Passage Time/BPT) earthquake recurrence models to evaluate fault-specific rupture probabilities and their implications for probabilistic seismic hazard assessment (PSHA). This approach systematically bridges the gap between traditional stationary models and the physical reality of seismic cycles, ensuring that the resulting hazard estimates reflect the current elapsed time since the last major rupture. Earthquake catalogs from USGS, BMKG, and historical sources were compiled for shallow events ( 50 km) between 1900–2023, and fault parameters were derived from national hazard maps and published geological studies. Recurrence intervals were estimated for 28 major fault segments across Sumatra, the Sunda Strait, and western Java. Results show strong temporal variability in seismic potential, with the Kumering South segment exhibiting the highest 50-year rupture probability (>50%) due to its elapsed time nearing the estimated recurrence interval. In contrast, segments such as Semangko West-A show markedly reduced short-term probability under the BPT model. PSHA simulations using OpenQuake reveal peak ground acceleration (PGA) values of 0.6–1.5 g for 2% exceedance in 50 years, indicating very high hazard levels in areas adjacent to the Sumatra Fault System. Incorporating time-dependent recurrence provides a more cycle-consistent spatial pattern compared to Poissonian results, reducing overestimation in early-cycle segments and enhancing hazard representation in late-cycle faults. While this study is constrained by uncertainties in historical recurrence intervals and fault slip-rates, these findings provide a more refined academic contribution to regional hazard characterization, supporting more robust risk mitigation strategies in Lampung Province.
Co-Authors Achmad Ahadin, Imam Agus Ariyanto Akhyadi, Ade Sadikin Ansi, Rahma Yunita Antonius Tri Widodo Arya Setya Nugroho Astuti, Dyah Puji Cahyandhika, Vega Dwi Dedi Sahputra Napitupulu, Dedi Sahputra Dewi, Adinda Putri Sari ENY SULISTYOWATI Fajhrin, Dinda Tsurmaiza Farduwin, Alhada Gendro Wiyono Hafeezul, Muhammad Haiyul Fadhli Irawati, Selvi Misnia Jumiatin, Dedah Jumiatin Junian, Wahyu Eko Kusumastuti Kusumastuti Melzi Octaviani Miftahul Jannah Moh. Jafar Sodiq Maksum Mursal Aziz Nasution, Atikah Rahmah Netrawati, Netrawati Nursyamsiyah, Siti Nurwijayanti Prabowo, Satria Bagus Prasetyo, Muhammad Andhika Budi Prasetyo, Nugroho Putri, Intan Andriani QOMARIYAH, SITI NUR Rahayu Utami Reza Rizki Rizki, Reza Sa'adah, Lailatus Sariani, Sariani Sinuhaji, Dwi Putri Meisya br Siregar, Nurul Hikmatul Alawiyah Sitio, Angelica Noviani Sri Hermuningsih Sumitra, Agus Triastuti, Neni Yudha Styawan Yusuf Habibi, Mohammad