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Journal : Journal of Multidisciplinary Applied Natural Science

Subsurface Identification Using Horizontal to Vertical Spectral Ratio and Inverse Velocity Modelling in Suoh Pull-apart Basin, Indonesia Mulyasari, Rahmi; Sarkowi, Muh; Haerudin, Nandi; Utama, Hari Wiki; Widiatama, Angga Jati; Darmawan, I Gede Boy; Kurniawan, Andri; Husni, Yayan Mi’rojul; Hesti, Hesti; Fatmawati, Nofita; Marlina, Serli
Journal of Multidisciplinary Applied Natural Science Articles in Press
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.366

Abstract

Suoh is a pull-apart basin located along the Semangko segment of the Sumatra Fault Zone and filled by thick fluvio-volcanic and alluvial deposits that strongly amplify seismic waves and increase surface damage during earthquakes. This study aims to perform seismic micro-zonation of Suoh using the horizontal-to-vertical spectral ratio (HVSR) method combined with shallow shear-wave velocity (Vs) inversion to support hazard assessment and land-use planning in the Suoh aspiring geopark. Single station microtremor measurements were acquired at 30 sites and processed with Geopsy to obtain dominant frequency (f0), amplification factor (A0), and seismic vulnerability index (Kg). The HVSR curves were further inverted using the Dinver module to retrieve 1D Vs profiles, with initial models constrained by the global CRUST1.0 model and local geology. The results indicate strong lateral variability in site conditions, with low f0 and high A0 values concentrated in the central–western basin, producing high Kg and reflecting thick-soft sediments overlying deep engineering bedrock (Vs ≥ 800 m/s) at depths exceeding 80–100 m. These high-vulnerability zones spatially coincide with shallow seismicity associated with the Semangko Fault. Based on Kg, the study delineates low, moderate, and high seismic vulnerability zones, highlighting areas where seismic amplification and resonance effects are most pronounced. The combination of HVSR parameters with 2D Vs imaging provides a practical framework for identifying high-risk zones and guiding risk-informed land-use planning in tectono-volcanic basins such as Suoh.
Co-Authors Achmad, Rahim Ade Kurnia Agam, Beryaldi Agus Sunaryo Agus Sunaryo Agus Utomo Agustin, Meri Ahmad Ahmad Ahmad Ahmad Amelia, Risky Nuri Andi Andi Andika Hutasoit, Kelvin ANDRI KURNIAWAN Anif, Anif Aris Suziman Arsi, Arsi Aryaneta, Yenni Asep Jatnika Aso, La Aswan, Marwis Aswat, Ibnu Athfaal, Khoirul Auliah, Muh Rifky Aulianto, Mutiara Aziz, Fajar Abdul Bagus Sapto Mulyatno Bambang Gunawan Budi Murtiyasa Dani, Ilham Darmawan, I Gede Boy Darmawan, Mochamad Ab Rizky Darwin Karim Dewi, Helen Selvia Dewi, Sasmala Dona Aji Karunia Putra, Dona Aji Karunia Dwiguna, Rezky Ariya Edi Suyanto Edison Edison Eka Askafi Endang Fauziati Erfani, Sandi Ermana, Rinda Fadlurrohman, Muhamad Daffa Falah, Romy Rohmatul Farhana, Hanifah Fifi Sandra Fitriani, Nadia Fitrianti Fitrianti, Fitrianti Fungky Marian Gusrini, Indah Nurlisa Hadinata, Fitra Wira Haerani, Wilda Hanavi, Muhammad Ilham Harsono Harsono Harsono Harsono Hendryawan, Paschal Herdian, Faldy Hidayat, Muhamad Saepul Hidayatika, Akroma Hindun, Hindun Husni, Yayan Mi’rojul Husniah, Wa Ode Hutasoit, Kelvin Andika Ida Ida Imran, Un Dini Indra Mahyudi Karyanto, Karyanto Kelvin Sihotang, Jeremia Khristina Yunita Kumalasari, Isti Nur Lekoa, Duferdurisa Ari Maharani, Ester MARIA BINTANG Maria Ulfa Markamah, Markamah Marlina, Lenni Mogi, Gabriela Muh Sarkowi MUHAMMAD FUAD Muhammad Wildan Muhibbin, Muhibbin Mulyasari, Rahmi Nanda Hanyfa Maulida Nandi Haerudin Nasrullah Nasrullah Nofita Fatmawati Nurhakim, Irfan Nurhakim, Rizal Nurlaili, Jesica Nursyahidah, Adhya Ode Yahyu Herliani Yusuf Oktiana, Regita Ordas Dewanto Praditya, Salman Prafitasari, Aulya Prayitno Prayitno Qoyyimul Amri, Muhammad Rachel Camila Rachim Rachman, Bella Putriyani RahmiMulyasari, Rahmi Ramadhan Tosepu Ramdani Salam Ratika, Ratika Ria Lestari, Ria Ria Safaria Sadif Rizki, Angga M Rohima Wahyu Ningrum, Rohima Wahyu Saifudin Saifudin salamah salamah Samsaifil, Samsaifil Sasmin, Sasmin Serli Marlina Sety, La Ode Muhamad Sholehah, Hafizah Siti Hajar Siti Mahani, Siti Solihah, Annisa Siti Sri Marlia Puteri Stefani, Karyn Irene Teresa Suci, Dende Sugeng Santoso Suparman Suparman Suryanto, Wiwit Sutama Taib, Suryani Tajuddin Abdullah Theresia Theresia Tricahyati, Titi Wahidin, Nurhalis Waode Ekadayanti Waode Heni Fitriani Wibowo, Rahmat Catur Widiatama, Angga Jati Wira Hadinata, Fitra Yansyah, Medi Yeni Pariyatin Zunaidah, Evi Zurba, Nabil