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All Journal Indonesian Journal of Geography Jurnal Inovasi Konstruksi
Rusdin, Andi Azhar
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences

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Exploring Aceh Fault Zone for Slip Rates and Paleoseismic Trenching Potential along Sumatran Fault Marliyani, Gayatri Indah; Hady, Aulia Kurnia; Klinger, Yann; Setianto, Agung; Helmi, Hurien; Kurniawan, Telly; Kambali, Retno Agung Prasetyo; Sugito, Zulham; Jihad, Abdi; Setiawan, Yosi; Rusdin, Andi Azhar; Rohadi, Supriyanto; Triyono, Rahmat; Karnawati, Dwikorita
Indonesian Journal of Geography Vol 56, No 1 (2024): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.93456

Abstract

We conducted a study on the Aceh Fault, an active right-lateral strike-slip fault in northern Sumatra, Indonesia. Despite its seismic hazard potential, the slip characteristics of this fault are not well-understood. Using a combination of remote sensing and field methods, we mapped the distribution of displacement recorded by offset channels along the fault. Our goal is to identify evidence of past surface rupture, characterize their tectonic geomorphology setting, and assess their potentials as slip-rate and paleoseismic sites. The documented right-lateral displacements of channels and ridges from 35 observation points are mostly in the order of magnitude of hundreds of meters, with only a few sites exhibiting meter-scale measurable offsets. Our results provide important first-order data that can be used to locate sites suitable for paleoseismic trenching or offset investigations. This information will support the development of a maximum magnitude and earthquake recurrence model of the fault, which are crucial for seismic hazard analysis in the region.
Dominant Frequency and Power Spectral Density Analysis for Determining the Location of Earthquake Shelters in the Rukoh Dam, Pidie Jihad, Abdi; Ardiyansyah, Tommy; Al Atas, Zaenal Abidin; Fajaruddin, Fajaruddin; Rusdin, Andi Azhar; P. N., T. Agus Putra
Jurnal Inovasi Konstruksi Vol 4, No 2 (2025): October
Publisher : Politeknik Pekerjaan Umum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56911/jik.v4i2.180

Abstract

Seismic activity around the Rukoh Dam, Pidie Regency, Aceh Province, is affected by two active fault systems, the Aceh Fault and the Seulimeum Fault. This condition requires a detailed study of soil response characteristics to support earthquake-resistant infrastructure planning, especially in determining the location of earthquake shelters. This study aims to evaluate the suitability of three potential earthquake shelter locations around the Rukoh Dam using microtremor data. Meanwhile, data analysis was carried out using the Horizontal to Vertical (H/V) spectral ratio method to determine the dominant frequency of the soil (Fo) and Power Spectral Density (PSD) to assess the characterization of the location. The results of the analysis showed that Point 1 had the highest Fo (5.0 Hz) and the shallowest sediment thickness (~15 m) which indicated stiff soil conditions and low seismic amplification potential. In contrast, points 2 and 3 showed lower Fo (2.0 Hz and 1.6 Hz, respectively) with a sediment thickness of 35 m, indicating a higher risk of amplification. Point 1 is recommended as a permanent shelter location, while points 2 and 3 require structural strengthening or alternative utilization.
Dominant Frequency and Power Spectral Density Analysis for Determining the Location of Earthquake Shelters in the Rukoh Dam, Pidie Jihad, Abdi; Ardiyansyah, Tommy; Al Atas, Zaenal Abidin; Fajaruddin, Fajaruddin; Rusdin, Andi Azhar; P. N., T. Agus Putra
Jurnal Inovasi Konstruksi Vol 4, No 2 (2025): October
Publisher : Politeknik Pekerjaan Umum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56911/jik.v4i2.180

Abstract

Seismic activity around the Rukoh Dam, Pidie Regency, Aceh Province, is affected by two active fault systems, the Aceh Fault and the Seulimeum Fault. This condition requires a detailed study of soil response characteristics to support earthquake-resistant infrastructure planning, especially in determining the location of earthquake shelters. This study aims to evaluate the suitability of three potential earthquake shelter locations around the Rukoh Dam using microtremor data. Meanwhile, data analysis was carried out using the Horizontal to Vertical (H/V) spectral ratio method to determine the dominant frequency of the soil (Fo) and Power Spectral Density (PSD) to assess the characterization of the location. The results of the analysis showed that Point 1 had the highest Fo (5.0 Hz) and the shallowest sediment thickness (~15 m) which indicated stiff soil conditions and low seismic amplification potential. In contrast, points 2 and 3 showed lower Fo (2.0 Hz and 1.6 Hz, respectively) with a sediment thickness of 35 m, indicating a higher risk of amplification. Point 1 is recommended as a permanent shelter location, while points 2 and 3 require structural strengthening or alternative utilization.
Co-Authors Agung Setianto Al Atas, Zaenal Abidin Ardiyansyah, Tommy Dwikorita Karnawati Fajaruddin, Fajaruddin Gayatri Indah Marliyani Hady, Aulia Kurnia Helmi, Hurien Jihad, Abdi Kambali, Retno Agung Prasetyo Klinger, Yann Kurniawan, Telly P. N., T. Agus Putra Setiawan, Yosi Sugito, Zulham Supriyanto Rohadi, Supriyanto Triyono, Rahmat