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Nandi Haerudin
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Journal : Journal of Multidisciplinary Applied Natural Science

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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 A.Yudi Eka Risano Adelyra, Sabrina Agustin, Erisa Ahmad Z. Ahmad Z. Ahmad Z., Ahmad Z. Ahmad Zaenudin ahmad zarkasyi Akbari, Irgi Akroma Hidayatika Amelia, Virna Andien, Andien ANDRI KURNIAWAN Anwar, Hasrul Arianto, Khalila Wardah Arief I. H Arief I. H Arief I. H, Arief I. H Astri Niken Saputri Az Zahra Putri Sugiarto Bagus Sapto Bagus Sapto Mulyatno Catur, Rahmat Citra Persada Dani, Ilham DARMANSYAH . Darmansyah Darmansyah Darmawan, I Gede Boy Deassy Siska Deni Wijayanto Denta Winardi Setiawan Dersan Surya Effendi Dewi, Helen Selvia Dikpride Despa Djana, Miftahul Erfani, Sandri Fadila, Tiara Andika Farid, Muchammad Fatuha, Akmal Alfian Ferucha, Istifani Fista, Aksela Dian Ghiffary, Aviv Irfan Wildan Hadizar, M. Roja Nabil Harsyah, Ryan Putra Haryan, Nabilah Bintang Hayu Nurfaidah Helmy Fitriawan Helmy Fitriawan Heri Rustamaji Heriyanto Heriyanto Herti Utami Herti Utami Hesti Hesti Hesti Hesti Hesti Hesti Sahaja Hidayat, Dimas Setiawan Hidayatika, Akroma Husni, Yayan Mi’rojul I Gede Boy Darmawan I Gede Boy Darmawan Ida Bagus Suananda Yogi Ikhsan Hidayat Ilham Dani Imam Setiadi, Imam Irfan - Hanif Irza Sukmana Kadek Ramanda Karyanto Karyanto, Karyanto Karyanto, Karyanto Kuncoro, Kirana Helga Aimee Lia Lismeri Lia Lismeri Lismeri, Lia Matondang, Pebriadi Halomoan Maulia, Ikram Mauliza, Nadia Mayasari, Rizka Muchammad Farid Muh Sarkowi Muhammad Aditya Makki Muhammad Reza Fahlefi Muhammad Sarkowi Mulyasari, Rahmi Nabila, Salsa Nabilla, Meisha Najwa Aulia Izzati Ningsih, Restu Nofita Fatmawati Noorhidana, Vera A Noviari, Salsabila Nurfaidah, Hayu Nurlaili, Jesica Ordas Dewanto Persada, Citra Pramudana, Dhimas Radithya Gading Pranahayu Sekar Winahyu Prayoga, M. Fahry Puja Charisma A.W Puji Tri Andika Putri, Sefti Amelia Qalbu, Wan Fahayykal Azimah Rahmat C Wibowo Rahmat C Wibowo Rahmi Mulyasari Rahmi Mulyasari Rambe, Sibgha Alfirdausi Raudhah, Amna Fithri Restu Ningsih Riduan Riduan, Riduan Rifqi Muhammad Rizkiani, Deli Rizkiano, Aldika Rustadi ., Rustadi Rustadi Rustadi Rustadi Rustadi S.Pd. M Kes I Ketut Sudiana . Saippudin, Muhammad Salfira, Ginanda Saputri, Ulva Saputro, Sugeng Purwo Sari, Devi Kurnia Serli Marlina Setyawan, Andika Septa Siahaan, Sri Astuti Chrisma Sianturi, Rizky J. Solihin, Hafiz Ibnu Soraya Tiana Dewi Soulthan Salahudin Al Ayubi Sugeng Purwo Saputro Sugeng Purwo Saputro Suharno Suharno - Suharno Suharno Suharno Suharno Sumanjaya, Erlan - Syah, Aminudin Syahrani, Hanna Aulia Syamsurijal Rasimeng Theressia Githa Aurora Tiara Tabitha Titin Yulianti Unila, Hesti_9201 Valentin, Ferdio Voanda, Dinda Fitri Wibowo, Rahmat Catur Widiatama, Angga Jati Wijaya, Riki C Yogi, Ida Bagus Suananda Yuli Darni Yuli Darni Yuli Darni Yuniza, Nani Zahiya, Asda Arwa Zulkaromi, Muhammad