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Zhang Huimin, Jin Ping, Liu Wenxue, Li Xin, Zhang Ruiying. 2013: Construction of 3D velocity structure using local 1D model and travel-time calibration. Acta Seismologica Sinica, 35(2): 229-237. DOI: 10.3969/j.issn.0253-3782.2013.02.009
Citation: Zhang Huimin, Jin Ping, Liu Wenxue, Li Xin, Zhang Ruiying. 2013: Construction of 3D velocity structure using local 1D model and travel-time calibration. Acta Seismologica Sinica, 35(2): 229-237. DOI: 10.3969/j.issn.0253-3782.2013.02.009
shu

Construction of 3D velocity structure using local 1D model and travel-time calibration

  • 1.

    Northwest Institution of Nuclear Technology, Xi'an 710024, China

  • 2.

    Xi'an Jiaotong University, Xi'an 710049, China

  • 3.

    North Electro-Optic Corporation Ltd., Xi'an 710043, China

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  • Received Date: January 04, 2012
  • Revised Date: May 02, 2012
  • Published Date: February 28, 2013
    Graphical Abstract
    • Abstract
  • Calculating accurate regional phase travel-times through regional 3D velocity models constructed is one of the important means to improve regional seismic event location accuracy. Using local 1D model, ground truth (GT) events and geological data, construction of 3D velocity model is carried out as follows: First, we construct an initial 3D velocity structure through Kriging method using some local 1D velocity models; then, modify it repeatedly by GT event travel-times and geological data until the minimum travel-time bias is reached; and finally, the modified 3D velocity model is obtained. Location testing is performed with different velocity models. It shows that the modified 3D velocity model can improve regional event location accuracy, and the bias of epicenters is decreased by about 20% statistically.
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    • References (24)
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