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Experiments on Exploration of Shallow Fine Structures and the Construction of the 1-D Velocity Model in the Pingtan Island, Fujian
GUO Yang1, XU Jiajun1,2, LIN Chen1, JIN Xing1, YAO Huajian2, YANG Hongfeng3, CAI Huiteng1,4
1.Fujian Earthquake Agency, Fuzhou 350003, China;2.School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;3.Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong 999077, China;4.School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, China
摘要:
112 short-period seismographs were set up in the 400km2 area of Pingtan Island and its surrounding areas in Fujian. The combined observations of the airgun source and ambient noise source were carried out using a dense array to receive the 387 airgun signals excited around the island and one month of continuous ambient noise recording. The 1-D P-wave and S-wave shallow velocity model of Pingtan Island is obtained by the inversion of the airgun body wave's first arrival time data, and the reliability of the velocity model is verified by using the surface wave phase velocity dispersion curve, which can provide initial model for subsequent 3-D imaging. The experimental results show that this experiment is a successful demonstration of local scale green non-destructive detection, which can provide basic data for shallow surface structure research and strong vibration simulation of the Pingtan Island.
关键词:  Pingtan Island  Fujian  Dense array  Airgun  Ambient noise  1-D velocity model
DOI:10.19743/j.cnki.0891-4176.201902013
分类号:
基金项目:This project was sponsored by the Key Technologies R&D Program of Fujian Earthquake Agency (G201703) and the Seismic Science and Technology Spark Program, CEA (XH19023Y).
Experiments on Exploration of Shallow Fine Structures and the Construction of the 1-D Velocity Model in the Pingtan Island, Fujian
GUO Yang1, XU Jiajun1,2, LIN Chen1, JIN Xing1, YAO Huajian2, YANG Hongfeng3, CAI Huiteng1,4
1.Fujian Earthquake Agency, Fuzhou 350003, China;2.School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;3.Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong 999077, China;4.School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, China
Abstract:
112 short-period seismographs were set up in the 400km2 area of Pingtan Island and its surrounding areas in Fujian. The combined observations of the airgun source and ambient noise source were carried out using a dense array to receive the 387 airgun signals excited around the island and one month of continuous ambient noise recording. The 1-D P-wave and S-wave shallow velocity model of Pingtan Island is obtained by the inversion of the airgun body wave's first arrival time data, and the reliability of the velocity model is verified by using the surface wave phase velocity dispersion curve, which can provide initial model for subsequent 3-D imaging. The experimental results show that this experiment is a successful demonstration of local scale green non-destructive detection, which can provide basic data for shallow surface structure research and strong vibration simulation of the Pingtan Island.
Key words:  Pingtan Island  Fujian  Dense array  Airgun  Ambient noise  1-D velocity model