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All Journal Indonesian Journal of Geography Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Journal of Geoscience, Engineering, Environment, and Technology Jurnal Inovasi Konstruksi
Jihad, Abdi
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Astronomy Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Engineering Environmental Science Materials Science & Nanotechnology Physics

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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.
Reconstruction of the Indian Ocean Tsunami in 2004 in Sabang Based on the Current Land Cover for Tsunami Evacuation Sites Recommendations Jihad, Abdi; Al Atas, Zaenal; Banyunegoro, Vrieslend Haris; Anugrahningrum, Herdiyanti Resty; Ginting, Rika Adenila; Putra, Kurniallah Perdana; Rusdin, Andi Azhar; Ardiyansyah, Tommy; Yatimantoro, Tatok
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 13 No. 2 (2023)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v13n2.p174-189

Abstract

Sabang City has grown in term of city’s population as well as the tourism activity. The development also meant there are more area that has been used when compared to the time before the 2004 tsunami. This research was developed to re-identify tsunami-prone zones with the current land cover condition in Sabang City and to provide recommended safe locations, alternative evacuation routes, and additional evacuation sites. We used Cornell Multi-grid Coupled Tsunami Model (COMCOT) to carried out the tsunami simulation added with updated land cover to provide more accurate simulation model. The simulation pointed out several tsunami hazard zones in Sabang City, such as Balohan, Kuta Ateuh, and Iboih with expected tsunami heights to be more than 3 meters and arrival time less than 60 minutes. Those areas then surveyed to develop recommendations for tsunami risk reductions. The recommendations included nine additional evacuation buildings are proposed, three sites in each zone. Another recommendation is in form of evacuation routes in each zone to complement existing routes stated in RTRW document.
Seismic Hazard Estimation for Sumatra and Kalimantan Region Using Event-Based Probabilistic Seismic Hazard Analysis (EB-PSHA) Khalqillah, Aulia; Umar, Muksin; V. H. Simanjuntak, Andrean; Jihad, Abdi; H. Banyunegoro, Vrieslend
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 3 (2025): JGEET Vol 10 No 03 : September (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.3.21936

Abstract

Indonesia is located in a tectonically active region influenced by the interactions of several tectonic plates. This tectonics setting give rise to numerous active faults and subduction zones, making Indonesia highly susceptible to earthquakes. To mitigate earthquake risk, seismic hazard assessments are essential and contribute directly to the development of earthquake-resistant building codes or premium assets estimation for assets insurance. This study aims to assess seismic hazard analysis in Sumatra and Kalimantan using the Event-Based Probabilistic Seismic Hazard Analysis (EB-PSHA) method for a 250-year return period (0.4% annual exceedance probability in one year) for Peak Ground Acceleration (PGA) and Spectral Acceleration (SA) at 0.3 s and 0.6 s. Three seismic source models, Active Shallow Crusts, Subduction Interfaces, and Background Sources, are used in this analysis. A combined earthquake catalog from several agencies is used to estimate the magnitude of completeness ( ), a-value, and b-value based on the mainshock earthquake only. This analysis utilize Ground Motion Prediction Equations (GMPEs) randomly sampled to estimate the potential intensities. These findings reveal significant regional variations in seismicity, with the southern Sumatra showing high seismicity rate and the northern part indicating potential stress accumulation. Particularly in Bengkulu Province, due to the relative high seismicity rate based on the seismicity statistical parameters of a-value and b-value. It also suggests the influence of multiple megathrusts and active faults. In contrast, Kalimantan shows lower hazard overall, though East Kalimantan records localized high intensities due to the Meratus and Mangkahilat faults. Although Kalimantan’s seismicity is low, historical events demonstrate that distant earthquakes can still cause substantial impacts. The model has been validated by using six historical events and it is in good agreement more than 75% of correlation. The results offer valuable input for seismic risk analysis on the potential building loss estimation through Event Loss Table (ELT).
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 Al Atas, Zaenal Abidin Anugrahningrum, Herdiyanti Resty Ardiyansyah, Tommy Banyunegoro, Vrieslend Haris Dwikorita Karnawati Fajaruddin, Fajaruddin Gayatri Indah Marliyani Ginting, Rika Adenila H. Banyunegoro, Vrieslend Hady, Aulia Kurnia Helmi, Hurien Kambali, Retno Agung Prasetyo Khalqillah, Aulia Klinger, Yann Kurniawan, Telly P. N., T. Agus Putra Putra, Kurniallah Perdana Rusdin, Andi Azhar Setiawan, Yosi Sugito, Zulham Supriyanto Rohadi, Supriyanto Triyono, Rahmat Umar, Muksin V. H. Simanjuntak, Andrean Yatimantoro, Tatok