3D Near‐Surface Shear‐Wave Velocity Structure from Ambient‐Noise Tomography and Borehole Data in the Hefei Urban Area, Chinaстатья из журнала
Аннотация: Research Article| May 18, 2016 3D Near‐Surface Shear‐Wave Velocity Structure from Ambient‐Noise Tomography and Borehole Data in the Hefei Urban Area, China Cheng Li; Cheng Li aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Chinahjyao@ustc.edu.cn Search for other works by this author on: GSW Google Scholar Huajian Yao; Huajian Yao aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Chinahjyao@ustc.edu.cn Search for other works by this author on: GSW Google Scholar Hongjian Fang; Hongjian Fang aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Chinahjyao@ustc.edu.cn Search for other works by this author on: GSW Google Scholar Xianliang Huang; Xianliang Huang bInstitute of Engineering, Earthquake Administration of Anhui Province, Hefei 230031, China Search for other works by this author on: GSW Google Scholar Kesong Wan; Kesong Wan aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Chinahjyao@ustc.edu.cn Search for other works by this author on: GSW Google Scholar Haijiang Zhang; Haijiang Zhang aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Chinahjyao@ustc.edu.cn Search for other works by this author on: GSW Google Scholar Kangdong Wang Kangdong Wang cGeological Survey of Anhui Province, Hefei 230001, China Search for other works by this author on: GSW Google Scholar Author and Article Information Cheng Li aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Chinahjyao@ustc.edu.cn Huajian Yao aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Chinahjyao@ustc.edu.cn Hongjian Fang aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Chinahjyao@ustc.edu.cn Xianliang Huang bInstitute of Engineering, Earthquake Administration of Anhui Province, Hefei 230031, China Kesong Wan aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Chinahjyao@ustc.edu.cn Haijiang Zhang aLaboratory of Seismology and Physics of Earth's Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Chinahjyao@ustc.edu.cn Kangdong Wang cGeological Survey of Anhui Province, Hefei 230001, China Publisher: Seismological Society of America First Online: 14 Jul 2017 Online Issn: 1938-2057 Print Issn: 0895-0695 © 2016 by the Seismological Society of America Seismological Research Letters (2016) 87 (4): 882–892. https://doi.org/10.1785/0220150257 Article history First Online: 14 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Cheng Li, Huajian Yao, Hongjian Fang, Xianliang Huang, Kesong Wan, Haijiang Zhang, Kangdong Wang; 3D Near‐Surface Shear‐Wave Velocity Structure from Ambient‐Noise Tomography and Borehole Data in the Hefei Urban Area, China. Seismological Research Letters 2016;; 87 (4): 882–892. doi: https://doi.org/10.1785/0220150257 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySeismological Research Letters Search Advanced Search ABSTRACT Imaging near‐surface structure with active sources, such as dynamite or vibrators, is usually difficult in urban areas because of dense population and safety issues. However, ambient‐noise tomography can provide an alternative way to investigate near‐surface structures without such difficulties. Here, we conduct ambient‐noise tomography to investigate the near‐surface shear‐velocity structure in the urban area of the city of Hefei (about a 5 km×7 km region) in eastern China, using two weeks of continuous ambient‐noise data. The direct surface‐wave tomographic method with period‐dependent raytracing is used to invert all surface‐wave dispersion data in the period band 0.5–2 s simultaneously for 3D variations of shear‐velocity structures. To constrain the top 30‐m velocity structure in the inversion, we utilize the borehole data in the city of Hefei to obtain a better 3D reference wavespeed model in the top 30 m. Our tomographic results from surface to about 400 m depth suggest that the northern part of the urban region presents higher shear velocity than the southern part. This result is consistent with regional geology; that is, the southern part of the study region is closer to Chao Lake, the fifth largest freshwater lake in China, which has much thicker sediments and lower shear wavespeed. The sharp velocity variation in our obtained model matches the location of the Shushan fault, which is associated with large gravity variations. Our near‐surface velocity model of the Hefei urban area provides useful information for city planning as well as for earthquake strong ground motion prediction, which may bring strong engineering interests in the future. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Год издания: 2016
Авторы: Cheng Li, Huajian Yao, Hongjian Fang, Xianliang Huang, Kesong Wan, Haijiang Zhang, Kangdong Wang
Издательство: Seismological Society of America
Источник: Seismological Research Letters
Ключевые слова: Seismic Waves and Analysis, Seismic Imaging and Inversion Techniques, earthquake and tectonic studies
Открытый доступ: closed
Том: 87
Выпуск: 4
Страницы: 882–892