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Nurcahaya, Nurcahaya
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Liquefaction Analysis Using Horizontal to Vertical Spectral Ratio in Arang Beach, Labuhan Ijuk, Sumbawa Area Nurcahaya, Nurcahaya; Minardi, Suhayat; Zubaidah, Teti
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i2.12037

Abstract

Indonesia’s tectonic setting makes coastal areas highly vulnerable to seismic hazards, including liquefaction. This study aims to analyze the liquefaction potential in Arang Beach, Labuhan Ijuk, Sumbawa, using the Horizontal to Vertical Spectral Ratio (HVSR) method. Microtremor data were collected at 70 measurement points and processed using Geopsy through windowing, filtering, and HVSR analysis to obtain dominant frequency (f₀) and amplification factor (A₀), followed by inversion to estimate shear wave velocity (Vₛ), sediment thickness (h), and Poisson’s ratio (σ). The results show that f₀ ranges from 0.294–17.542 Hz and A₀ from 0.928–15.914, with low-frequency and high-amplification zones concentrated in the southern–western area, indicating thick, soft sediments. Vₛ values (63.486–712.48 m/s) further confirm the presence of very soft to hard subsurface layers, with high liquefaction susceptibility associated with low Vₛ, high σ, and thick sediments. These findings indicate that the southern–western part of the study area has the highest seismic vulnerability and liquefaction potential. This study concludes that HVSR is effective for identifying site effects and liquefaction-prone zones. The results provide a scientific basis for seismic microzonation, coastal spatial planning, and the development of earthquake-resistant infrastructure in vulnerable coastal regions.
Co-Authors Abdiana Ilosa, Abdiana Adrian, Rizki Agustar, Armi Akbarizan Akbarizan Amriani, Rina Ansori, Bayu Anwar, Suhardi Mappe Aqzhariady Khartha Bascara, Donni Batubara, Arifin Ilham Budi, Agus Dalimunthe, Fikri Al Muhaddits Dany Try Hutama Hutabarat Darni Darni Daryanto, Mahbub Delardi, Egi Dimas Prasetyo Erna Dewi . Gulo, Hadyan Hanif Hanif Hapzi Ali Hasibuan, Nur Sahdiah Ikhwanuddin, Mohammad Imam Yazid IRWANSYAH, ADE Junaidi Junaidi Karimuddin, Karimuddin Lubis, Fauziah M. Taufiq Mahvira, Dinda Ayu Mochammad Sahid, Mualimin Muhammad Amar Adly, Muhammad Amar Muhammad Tuah, Muhammad Musa, Muhammad Ichwan Muzakir Nasoetion, Fawzia Nasution, Muhammad Idris Natsir, Uhud Darmawan Nauli Tama Sari Niko, Ferlan Nurman Nurman Nurrahmi Hayani Omega Raya Simarangkir, Omega Raya Prabuning, Derta Pratiwi, Alifiah Prinanda, Muhammad Naufal Rahmani, Ilham Ray Suryadi, Ray Reskiawan, Bimas - Romansyah Sahabuddin Romi, Muhammad rosalia rosalia Sahmiar Pulungan, Sahmiar Sani, Indira Aprilia Sari, Vivi Melvita Silitonga, Ahmad Helmisyam Sinaga, Samdoni Jarwal Sridepi, Sridepi Suhayat Minardi Sultan Sultan Syafruddin Syam Tanjung, Annisya Raya Tanjung, Faisal Teti Zubaidah Thoat Stiawan Yusuf, Siti Sahnia Mammenasa Daeng Zuhriandi, Novrizal