Estimation of Vs Structure of Krueng Aceh and its Suburb Basin of Aceh Province, Indonesia, Derived from Microtremor Measurements
The Aceh and Seulimeum Faults flank the Krueng Aceh Basin in Indonesia, and the shear-wave velocity (Vs) structure of the basin is not extensively available. Understanding the Vs structure is very important in order to figure out how the basin structures seemingly appear, and this can eventually be...
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| Format: | Article |
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MDPI AG
2019-04-01
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| Series: | Geosciences |
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| Online Access: | https://www.mdpi.com/2076-3263/9/4/186 |
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| author | Asrillah Asrillah Marwan Marwan Umar Muksin Rusydy Ibnu Sasaki Takao Furumoto Yoshinori Minami Yuichiro Hikime Chisa |
| author_facet | Asrillah Asrillah Marwan Marwan Umar Muksin Rusydy Ibnu Sasaki Takao Furumoto Yoshinori Minami Yuichiro Hikime Chisa |
| author_sort | Asrillah Asrillah |
| collection | DOAJ |
| description | The Aceh and Seulimeum Faults flank the Krueng Aceh Basin in Indonesia, and the shear-wave velocity (Vs) structure of the basin is not extensively available. Understanding the Vs structure is very important in order to figure out how the basin structures seemingly appear, and this can eventually be used to generate a microzonation map for other forthcoming studies. To provide this, Vs was measured over an area approximately covering Banda Aceh City and its surroundings, by setting two lines consisting of eight points projected in the NW–SE and SW–NE orientations. This research aims to facilitate the approximation of the Vs structure characteristics of the Krueng Aceh Basin using the microtremor array method (MAM). Triangular configurations were set by deploying four seismometers following an M-station geometry for three different array sizes (i.e., 3, 10, and 30 m in distance). The data were then processed by utilizing the spatial autocorrelation (SPAC) technique. The result shows that the Vs structure generally dips down from SE to NW, and it gradually declines from SW to NE. The combination of these Vs structures tends to be oblique toward the SW–NE direction. This form may be affected by the Aceh Segment Fault which is more active than the Seulimeum Segment Fault. The average maximum penetration depth and Vs are 603 m and 947.5 m/s in the SE–NW orientation, and 650 m and 958 m/s in the SW–NE direction. Generally, the thickness of the strata is greater in the upstream area compared to the downstream area. Their composition consists of alluvium (A) at the uppermost layer and diluvium (D) at the underlying layers. Then, all of the identified strata are aged from the Pleistocene to Tertiary Pleistocene (Tp). These characteristics of the strata could potentially cause surface damages as a result of site effect responses when an earthquake is occurring. |
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| institution | Directory Open Access Journal |
| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-12-21T13:39:40Z |
| publishDate | 2019-04-01 |
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| record_format | Article |
| series | Geosciences |
| spelling | doaj.art-e1274d5452e3421b858e616c8f1b62fe2022-12-21T19:02:03ZengMDPI AGGeosciences2076-32632019-04-019418610.3390/geosciences9040186geosciences9040186Estimation of Vs Structure of Krueng Aceh and its Suburb Basin of Aceh Province, Indonesia, Derived from Microtremor MeasurementsAsrillah Asrillah0Marwan Marwan1Umar Muksin2Rusydy Ibnu3Sasaki Takao4Furumoto Yoshinori5Minami Yuichiro6Hikime Chisa7Geophysical Engineering Department, Universitas Syiah Kuala, Darussalam-Banda Aceh 23111, IndonesiaGeophysical Engineering Department, Universitas Syiah Kuala, Darussalam-Banda Aceh 23111, IndonesiaGeophysical Engineering Department, Universitas Syiah Kuala, Darussalam-Banda Aceh 23111, IndonesiaGeological Engineering Department, Universitas Syiah Kuala, Darussalam-Banda Aceh 23111, IndonesiaChi-ken Sogo Consultant; Tokyo 116-0013, JapanNational Institute of Technology, Nagano College; Nagano City 381-8550, JapanSumiko Resources Exploration & Development; Tokyo 103-6305, JapanCTI Engineering; Tokyo 103-8430, JapanThe Aceh and Seulimeum Faults flank the Krueng Aceh Basin in Indonesia, and the shear-wave velocity (Vs) structure of the basin is not extensively available. Understanding the Vs structure is very important in order to figure out how the basin structures seemingly appear, and this can eventually be used to generate a microzonation map for other forthcoming studies. To provide this, Vs was measured over an area approximately covering Banda Aceh City and its surroundings, by setting two lines consisting of eight points projected in the NW–SE and SW–NE orientations. This research aims to facilitate the approximation of the Vs structure characteristics of the Krueng Aceh Basin using the microtremor array method (MAM). Triangular configurations were set by deploying four seismometers following an M-station geometry for three different array sizes (i.e., 3, 10, and 30 m in distance). The data were then processed by utilizing the spatial autocorrelation (SPAC) technique. The result shows that the Vs structure generally dips down from SE to NW, and it gradually declines from SW to NE. The combination of these Vs structures tends to be oblique toward the SW–NE direction. This form may be affected by the Aceh Segment Fault which is more active than the Seulimeum Segment Fault. The average maximum penetration depth and Vs are 603 m and 947.5 m/s in the SE–NW orientation, and 650 m and 958 m/s in the SW–NE direction. Generally, the thickness of the strata is greater in the upstream area compared to the downstream area. Their composition consists of alluvium (A) at the uppermost layer and diluvium (D) at the underlying layers. Then, all of the identified strata are aged from the Pleistocene to Tertiary Pleistocene (Tp). These characteristics of the strata could potentially cause surface damages as a result of site effect responses when an earthquake is occurring.https://www.mdpi.com/2076-3263/9/4/186MAMSPACTriangle arrayVs structureKrueng Aceh BasinAceh FaultSeulimeum Fault |
| spellingShingle | Asrillah Asrillah Marwan Marwan Umar Muksin Rusydy Ibnu Sasaki Takao Furumoto Yoshinori Minami Yuichiro Hikime Chisa Estimation of Vs Structure of Krueng Aceh and its Suburb Basin of Aceh Province, Indonesia, Derived from Microtremor Measurements Geosciences MAM SPAC Triangle array Vs structure Krueng Aceh Basin Aceh Fault Seulimeum Fault |
| title | Estimation of Vs Structure of Krueng Aceh and its Suburb Basin of Aceh Province, Indonesia, Derived from Microtremor Measurements |
| title_full | Estimation of Vs Structure of Krueng Aceh and its Suburb Basin of Aceh Province, Indonesia, Derived from Microtremor Measurements |
| title_fullStr | Estimation of Vs Structure of Krueng Aceh and its Suburb Basin of Aceh Province, Indonesia, Derived from Microtremor Measurements |
| title_full_unstemmed | Estimation of Vs Structure of Krueng Aceh and its Suburb Basin of Aceh Province, Indonesia, Derived from Microtremor Measurements |
| title_short | Estimation of Vs Structure of Krueng Aceh and its Suburb Basin of Aceh Province, Indonesia, Derived from Microtremor Measurements |
| title_sort | estimation of vs structure of krueng aceh and its suburb basin of aceh province indonesia derived from microtremor measurements |
| topic | MAM SPAC Triangle array Vs structure Krueng Aceh Basin Aceh Fault Seulimeum Fault |
| url | https://www.mdpi.com/2076-3263/9/4/186 |
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