Measurement of interstation phase velocity by wavelet transformation

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• 作者：Qingju Wu (1)
  Xiufen Zheng (1)
  Jiatie Pan (1)
  Fengxue Zhang (1)
  Guangcheng Zhang (1)
  
• 关键词：dispesion ; phase velocity ; wavelet transform ; P315.63
• 刊名：Earthquake Science
• 出版年：2009
• 出版时间：August 2009
• 年：2009
• 卷：22
• 期：4
• 页码：425-429
• 全文大小：647KB
• 参考文献：1. Bloch S and Hales A L (1968). New techniques for the determination of surface wave phase velocities. / Bull Seism Soc Amer 58: 1 021鈥? 034.
  2. Dziewonski A, Bloch S and Landisman N (1969). A technique for the analysis of transient seismic signals. / Bull Seism Soc Amer 59: 427鈥?44.
  3. Hwang H J and Mitchell B J (1986). Interstation surface wave analysis by frequency-domain Wiener deconvolution and modal isolation. / Bull Seism Soc Amer 76: 847鈥?64.
  4. Landisman M, Dziewonski and Sato Y (1969). Recent improvements in the analysis of surface wave observations. / Geophys J R astr Soc 17: 369鈥?01.
  5. Nakanishi I (1979). Phase velocity and / Q of mantle Rayleigh waves. / Geophys J R Soc 58: 35鈥?9.
  6. Knopoff L and Schwab F A (1968). Apparent initial phase of a source of Rayleigh waves. / J Geophys Res 73: 755鈥?60. CrossRef
  7. Kovach R L (1978). Seismic surface waves and crustal and upper mantle structure. / Rev Geophys Space Phys 16: 1鈥?3. CrossRef
  8. Taylor S R and Toksoz M N (1982). Measurement of interstation phase and group velocities and / Q using Wiener filtering. / Bull Seism Soc Amer 72:73鈥?1.
  
• 作者单位：Qingju Wu (1)
  Xiufen Zheng (1)
  Jiatie Pan (1)
  Fengxue Zhang (1)
  Guangcheng Zhang (1)
  
  1. Institute of Geophysics, China Earthquake Administration, Beijing, 100081, China
  
• ISSN：1867-8777

文摘

In this paper, we present wavelet transformation method to measure interstation phase velocity. We use Morlet wavelet function as mother wavelet to filter two seismograms at various period of interest, and correlate the wavelet filtered seismograms to form cross-correlogram. If both wavelet filtered signals are in phase at that period, the phase of the cross-correlogram is a minimum. Using 3-spline interpolation to transform cross-correlation matrix to a phase velocity verse period image, it is convenient for us to measure interstation phase velocity.