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All Journal BULETIN OSEANOGRAFI MARINA BERKALA FISIKA TELKOMNIKA (Telecommunication Computing Electronics and Control) IJOG : Indonesian Journal on Geoscience GRADIEN Jurnal Fisika Unand Jurnal Fisika FLUX Jurnal Geocelebes Journal of Geoscience, Engineering, Environment, and Technology Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Ilmu Fisika Jurnal Pendidikan Fisika dan Teknologi Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Indonesian Physical Review Jurnal Kumparan Fisika Indonesian Journal on Geoscience Navigation Physics : Journal of Physics Education Indonesian Journal on Geoscience Indonesian Journal of Community Empowerment and Service J-ABDIPAMAS (Jurnal Pengabdian Kepada Masyarakat) Jurnal Meteorologi dan Geofisika Jurnal Fisika
Arif Ismul Hadi
Department Of Physics, Faculty Of Mathematics And Natural Sciences, University Of Bengkulu
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Journal : Jurnal Fisika

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Mapping of Natural Frequency, Amplification, Seismic Vulnerability, and Vs30 Velocity in Selebar District, Bengkulu City Siagian, Samuel; Refrizon; Hadi, Arif Ismul
Jurnal Fisika Vol. 15 No. 1 (2025): Jurnal Fisika 15 (1) 2025
Publisher : Universitas Negeri Semarang

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Abstract

Research using the microtremor method has been conducted in Selebar District, Bengkulu City, to estimate the ground response to earthquake vibrations. The purpose of this research is to support building mitigation in earthquake-prone areas. Microzonation mapping is conducted by analyzing the dominant frequency (f0), amplification factor (A0), seismic vulnerability (Kg), and shear wave velocity (Vs30). The Horizontal to Vertical Spectral Ratio (HVSR) method is used in microtremor analysis. The results show the dominant frequencies consist of 40.8% hard gravelly sandstone, 26.5% alluvial rock with a thickness of 5 meters, 18.4% alluvial rock with bluff formation and 14.3% delta sediments. The amplification values include 40.8% in the low category, 56.1% in the medium category and 3.1% in the high category. The seismic vulnerability index indicates that 63.3% is below 3 level, 26.5% is between 3-6 level and 10.2% is between 6-9 level. The shear wave velocity (Vs30) values show that 8.2% is above 1500 m/s, 10.2% is between 750 m/s and 1500 m/s, 55.1% is between 350 m/s and 750 m/s, 25.5% is between 175 m/s and 350 m/s, and 1.1% is below 175 m/s. In conclusion, Selebar District has hard rock layers and low seismic vulnerability, rendering it generally safe from earthquakes.
Co-Authors Agung Sedayu Al Ansory, Andre Rahmat Al-Ansory, Andre Rahmat Andre Rahmat Al Ansory Anggi, Arya Putra Ansory, Andre Rahmat Al Arrahma, Mawadatul Ashar Muda Lubis Awaliyah, Isfardian Agustin Darmawan Ikhlas Fadli Darmawan Ikhlas Fadli Darmawan Ikhlas Fadli Efriyadi Efriyadi Elfi Yuliza Fadillah Humairah Fadli, Darmawan Ikhlas Falenia, Felly Farid, Muchammad Farid, Muchammad Farid, Muchammad Farid, Muhammad Febri Adrianto Adrianto Frinsyah Virgo Giltro Kencoro Gumanty, Usman Halauddin Halauddin Halauddin Hana Raihana Hardiansa, Debi Hardiansyah, Debi Hardianza, Meno Harlianto, Budi Helinnes, Putri Herliana Herliana Hesna Nurliana Hilmi Zakarya Ikhlas Fadli, Darmawan Insani, Redha Radiatul Isfardian Agustin Awaliyah Johan, Septi Julia Inti Sari Kamila, Nur Husniatin Khairul Amri Kirbani Sri Brotopuspito Kirbani Sri Brotopuspito Larang, Miranda Puspa Lindung Zalbuin Mase, Lindung Zalbuin Lizalidiawati Lizalidiawati Lusi Puspita Sari M Farid M. Dahlan M. Farid Maghribi, Faritz Bagda Malik Krisbudianto Marzuki Marzuki Melly Angglena Misliniyati, Rena Mohtar Mohtar Muammar, Zaky Muchammad Farid Muchammad Farid Muchammad Farid Muda Lubis, Ashar Muhammad Farid Muhammad Farid Muhammad Farid Natasya, Indah Dwi Novtrisa, Indri Nur Husniatin Kamila Nurul Hudayat Nurul Hudayat Nurwijayanti Paisal Edo Putri, Aisyah Cindy Phylia Putri, Elona Gita Gatra Rabbani, Muhammad Rifqi Rafly, Tegar Al Rahmat Al-Ansory, Andre Rahmawati, Nurul 'Ilmi Rahmawati, Nurul Ilmi Raihana, Hana Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon Refrizon, Refrizon Refrizon, Refrizon Rida Samdara Rida Samdara Sapanur, Destika Meisy Saragih, Ronni Samuel Sari, Julia Inti Sari, Julia Inti Sari, Lusi Puspita Sesilia, Tiara Siagian, Samuel Suhendra Suhendra Suhendra Suhendra Sumanjaya, Erlan - Sumariyah Sumariyah Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Suwarsono Sya’adah, Isni Taufiqurrahman Syah, Muhammad Wahyudi Wahyudi Wahyudi Wahyudi Yudhi Harini Bertham, Yudhi Harini Yuni Setyowati Zulfia Memi Mayasari