| Genetic algorithm in seismic waveform inversion and its application in deep seismic sounding data interpretation |
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| 作者姓名： | 王夫运 张先康 |
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| 作者单位： | Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, China |
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| 基金项目： | National Nature Science Foundation of China （40334040） ＆ Joint Seismological foundation of CEA （101026） Contribution No. 200603, Geophysical Exploration Center, China Earthquake Administration. |
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| 摘 要： | A genetic algorithm of body waveform inversion is presented for better understanding of crustal and upper mantle structures with deep seismic sounding （DSS） waveform data. General reflection and transmission synthetic seismogram algorithm, which is capable of calculating the response of thin alternating high and low velocity layers, is applied as a solution for forward modeling, and the genetic algorithm is used to find the optimal solution of the inverse problem. Numerical tests suggest that the method has the capability of resolving low-velocity layers, thin alternating high and low velocity layers, and noise suppression. Waveform inversion using P-wave records from Zeku, Xiahe and Lintao shots in the seismic wide-angle reflection/refraction survey along northeastern Qinghai-Xizang （Tibeteau） Plateau has revealed fine structures of the bottom of the upper crust and alternating layers in the middle/lower crust and topmost upper mantle.
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| 关 键 词： | 波形 数据解释 地震 波转换 |
| 文章编号： | 1000-9116（2006）02-0163-10 |
| 收稿时间： | 2005-08-19 |
| 修稿时间： | 2006-01-11 |
Genetic algorithm in seismic waveform inversion and its application in deep seismic sounding data interpretation |
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| WANG Fu-yun,ZHANG Xian-kang.Genetic algorithm in seismic waveform inversion and its application in deep seismic sounding data interpretation[J].Acta Seismologica Sinica(English Edition),2006,19(2):163-172. |
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| Authors: | WANG Fu-yun ZHANG Xian-kang |
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| Institution: | Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, China |
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| Abstract: | A genetic algorithm of body waveform inversion is presented for better understanding of crustal and upper mantle structures with deep seismic sounding (DSS) waveform data. General reflection and transmission synthetic seis- mogram algorithm, which is capable of calculating the response of thin alternating high and low velocity layers, is applied as a solution for forward modeling, and the genetic algorithm is used to find the optimal solution of the inverse problem. Numerical tests suggest that the method has the capability of resolving low-velocity layers, thin alternating high and low velocity layers, and noise suppression. Waveform inversion using P-wave records from Zeku, Xiahe and Lintao shots in the seismic wide-angle reflection/refraction survey along northeastern Qing- hai-Xizang (Tibeteau) Plateau has revealed fine structures of the bottom of the upper crust and alternating layers in the middle/lower crust and topmost upper mantle. |
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| Keywords: | genetic algorithm waveform inversion numerical test deep seismic sounding fine crustal structure |
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