Liu Qinghua, Lu Laiyu, He Zhengqin, Hu Gang, Wang Kaiming, Gong Yan. 2016: Inversion of S-wave velocity structure near the surface by spatial autocorrelation technique of microtremors. Acta Seismologica Sinica, 38(1): 86-95. DOI: 10.11939/jass.2016.01.008
Citation: Liu Qinghua, Lu Laiyu, He Zhengqin, Hu Gang, Wang Kaiming, Gong Yan. 2016: Inversion of S-wave velocity structure near the surface by spatial autocorrelation technique of microtremors. Acta Seismologica Sinica, 38(1): 86-95. DOI: 10.11939/jass.2016.01.008

Inversion of S-wave velocity structure near the surface by spatial autocorrelation technique of microtremors

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  • Received Date: April 25, 2015
  • Revised Date: June 23, 2015
  • Published Date: December 31, 2015
  • In the field of near surface geophysics, the inversion for the velocity structure based on the dispersion of surface waves extracted by spatial auto-correlation (SPAC) of microtremors is a simple and reliable geotechnique scheme. This paper deals with the ambient seismic noise recorded by a circular array, and introduces a simple method to extract the dispersion curve of surface wave by processing the SPAC coefficients properly. The reliable dispersion curves in the frequency range of 6.7—23 Hz are extracted. The S-wave velocity structure is obtained by fitting the observed dispersion curves with predicted ones. The structure by inversion agrees well with that obtained by drilling test under the array.
  • 罗松, 罗银河. 2014. SPAC系数计算方法研究[C]//2014中国地球科学联合会学术年会论文集.

    Luo S, Luo Y H. 2014. Study on calculation methods of SPAC[C]//Collected Papers of Annual Meeting of Chinese Geoscience Union in 2014. Beijing: Chinese Geophysical Society: 755 (in Chinese).
    姚运生, 付少兰. 2000. 微动探测地下构造的原理和方法[C]// 2000年中国地球物理学会年刊. 北京: 地球物理学会: 152.

    Yao Y S, Fu S L. 2000. The principle and method of microtremor detect underground structure[C]//Annals of the Chinese Geophysical Society in 2000. Beijing: Chinese Geophysical Society: 152 (in Chinese).
    Herrmann R B, Ammon C J. 2002. Computer programs in seismology: Surface waves, receiver functions and crustal structure[CP/OL]. [2015-02-18]. http://www.eas.slu.edu/eqc/eqccps.html.
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