AcehSeis project provides insights into the detailed seismicity distribution and relation to fault structures in Central Aceh, Northern Sumatra

Muksin, Umar; Bauer, Klaus; Muzli, Muzli; Ryberg, Trond; Irwandi, Irwandi; Masturiyono, Masturiyono; Weber, M.

doi:10.1016/j.jseaes.2018.11.002

Cited by 49 publications

(33 citation statements)

References 26 publications

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“…To better assess seismic hazard potential of earthquakes in mainland Sumatra, published studies have focused on paleoearthquakes (Bellier et al, 1997), epicenter relocations (Hurukawa et al, 2014;Newcomb & McCann, 1987;Nugraha et al, 2018;Pesicek et al, 2010), aftershock distributions (Muzli et al, 2018;Widiwijayanti et al, 1996), field observations of surface ruptures (Daryono et al, 2012;Daryono & Tohari, 2016;Untung et al, 1985), deterministic and probabilistic hazard assessments (Natawidjaja & Triyoso, 2007), active fault mapping (Fernandez-Blanco et al, 2016;Muksin et al, 2019;Natawidjaja et al, 2017;Sieh & Natawidjaja, 2000;Weller et al, 2012), fault slip rates (Bellier & Sebrier, 1995;Bradley et al, 2017;Genrich et al, 2000;Ito et al, 2012;Natawidjaja et al, 2017;Prawirodirdjo et al, 2000;Tong et al, 2018), in situ stress analysis (Sahara et al, 2018), source characteristics of ruptures (Duquesnoy et al, 1996;Gunawan et al, 2018;Ito et al, 2016;Prawirodirdjo et al, 2000;Reid, 1913), and postseisimic processes (Gunawan et al, 2019). However, none of these studies used well-constrained near-field geodetic data to address the seismogenic depth and spatial distribution of coseismic slip, or to study the nature of the tectonic features that control earthquake rupture sizes along the SFZ.…”

Section: Introductionmentioning

confidence: 99%

Structural Controls on Rupture Extent of Recent Sumatran Fault Zone Earthquakes, Indonesia

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Structural Controls on Rupture Extent of Recent Sumatran Fault Zone Earthquakes, Indonesia

et al. 2020

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“…Two historical earthquakes that occurred near Banda Aceh was generated by Seulimeum Segment with M 6.5 in 1964 and Aceh Segment (M 6.0) in 1997. Besides, another felt earthquake occurred outside two segments in Bener Meriah 2013 (M 6.2) and Pidie Jaya 2016 (M 6.5) with strike-slip mechanism (Muksin et al, 2019;Simanjuntak et al, 2018Simanjuntak et al, , 2019Qadariyah et al, 2018). Last, the earthquake in 2020 occurred with M 4.8 near Peukan Bada.…”

Section: Tectonic and Geologymentioning

confidence: 99%

“…Aceh segment stretches from Tangse to Aceh Island (covering Pidie and Banda Aceh regions). Meanwhile, Seulimeum Segment extends from Tangse through Seulawah Area to Sabang (Omang et al, 2017;Muzli et al, 2018;Muksin et al, 2019) as shown in figure 1. Aceh segment can be included as one of the most important faults because it has not produced an earthquake for a long time and potential to generate M > 6 (Simanjuntak et al, 2017, Ito et al, 2012.…”

Section: Tectonic and Geologymentioning

confidence: 99%

“…Banda Aceh can be categorized as the earthquake-prone city in Indonesia because of the actively local tectonic process. The process is mostly influenced by two active segments namely Seulimeum in the NE part and Aceh in the SW part during Cenozoic (Sieh and Natawidjaja, 2000;McCaffrey, 2009;Craig and Copley, 2018;Muzli et al, 2018;Muksin et al, 2019). Both segments have potential magnitude ± 6.0 with a slip rate of 2.2 -2.5 cm/year (Ito et al, 2012;Simanjuntak and Olymphia, 2017;Bradley et al, 2017;Tong et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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A Microtremor Survey to Identify Seismic Vulnerability Around Banda Aceh Using HVSR Analysis

Simanjuntak

Asnawi

Muksin

et al. 2020

EKW

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Banda Aceh can be categorized as an earthquake-prone city because of the existence of two active segments namely Seulimeum and Aceh. Both segments are considered to provide great potential damage in the future. In this article, we conduct a microtremor survey in the Peukan Bada, sub-part of Banda Aceh city, to learn the vulnerability level and support disaster mitigation plan. A total of 20 sites were measured with a seismometer to record the seismic waveform. The waveform was recorded in 45 minutes with a sampling rate of 100 sps and has analyzed using the horizontal-vertical spectrum ratio (HVSR). The results obtained are the dominant parameters, such as the period with a range of 0 – 0.5s, frequency with a range of 0 – 6 Hz, seismicity vulnerability index with a range of 0.1 – 0.5. The result was relevant to the geological conditions of Peukan Bada that dominated by alluvial rocks and mud sediments. The level of vulnerability (Kg > 1.0) obtained is quite high and proportional to the soil type that can amplify the seismic waveform. The results obtained are expected to be a supporting study of disaster mitigation and understand the geological conditions of Banda Aceh in terms of seismic vulnerability.Abstrak: Banda Aceh dapat dikategorikan sebagai kota rawan gempa karena adanya dua segmen aktif yaitu Seulimeum dan Aceh. Kedua segmen tersebut bisa memberikan potensi kerusakan yang besar di masa mendatang. Pada tulisan ini, kami melakukan survei mikrotremor di Kecamatan Peukan Bada, salah satu sub-wilayah kota Banda Aceh, untuk mempelajari tingkat kerentanan dan mendukung rencana mitigasi bencana. Sebanyak 20 lokasi diukur dengan seismometer untuk merekam bentuk gelombang seismik. Gelombang direkam selama 45 menit dengan jumlah sampel 100 sps dan dianalisis menggunakan horizontal-vertical spectrum ratio (HVSR). Hasil yang diperoleh adalah parameter yang dominan yaitu periode dengan rentang 0 – 0,5s, frekuensi dengan range 0 - 6 Hz, indeks kerentanan kegempaan dengan rentang 0,1 – 0,5. Hasil tersebut relevan dengan kondisi geologi Peukan Bada yang didominasi oleh batuan aluvial dan endapan lumpur. Tingkat kerentanan (Kg > 1,0) yang diperoleh cukup tinggi dan sebanding dengan jenis tanah yang dapat memperbesar gelombang seismik. Hasil yang diperoleh diharapkan dapat menjadi pendukung kajian mitigasi bencana dan memahami kondisi geologi Banda Aceh dari segi kerentanan seismik.

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“…Such a long fault system splits into 20 segments. The seismic activity along the GSF has been studied extensively, primarily on the ground using geological and geodetic studies [1] and active fault mapping along the Sumatran fault trajectory based on seismological and geomorphological data [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Continuity of Great Sumatran Fault in the Marine Area Revealed by 3d Inversion of Gravity Data

et al. 2020

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The Great Sumatran Fault (GSF) is a 1900-km-long fault extending from Lampung, Indonesia, to India's Andaman Islands. The fault location is not only on the land but also in the marine area. Previous studies were only focused on the land area of Sumatra and Andaman Islands even though the marine fault has also impacted earthquakes and tsunamis such as in 2004. As an effort to disaster risk mitigation, this study used the gravity method to map and study the continuity of the GSF in the marine area from the Aceh Province, Indonesia, to the Andaman Islands, India. The gravity data were obtained from Topex with a resolution of 1.85 km/px. Based on the Bouguer data, the subduction zone in the western part of the Indian Ocean is observed with the anomaly of 500–700 mGal, while the residual structure of GSF, relative to the subduction zone, only comes to clarity through a horizontal derivative transformation with anomaly 130-250 mGal. To delineate the fault's geometry, the data were inverted by GRABLOX 1.6 using Singular Value Decomposition and Occam methods. The 3D modeling results also clearly show the contrast density between regional faults such as subduction zones on the Westside of the West Andaman Fault (WAF). The GSF faults can also be well demonstrated at 50 km depth. Based on these results, the gravity Topex is potentially used as a preliminary study of the GSF activity in the marine area.

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AcehSeis project provides insights into the detailed seismicity distribution and relation to fault structures in Central Aceh, Northern Sumatra

Cited by 49 publications

References 26 publications

Structural Controls on Rupture Extent of Recent Sumatran Fault Zone Earthquakes, Indonesia

Structural Controls on Rupture Extent of Recent Sumatran Fault Zone Earthquakes, Indonesia

A Microtremor Survey to Identify Seismic Vulnerability Around Banda Aceh Using HVSR Analysis

Continuity of Great Sumatran Fault in the Marine Area Revealed by 3d Inversion of Gravity Data

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