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| Measurement of interstation phase velocity by wavelet transformation |
| Qingju Wu, Xiufen Zheng, Jiatie Pan, Fengxue Zhang, Guangcheng Zhang |
| Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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Abstract 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.
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Received: 02 June 2009
Published: 10 August 2009
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| Fund:National Natural Science Foundation of China (No.40774039) |
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Corresponding Authors:
Qingju Wu
E-mail: wuqj@cea-igp.ac.cn
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