中国数字地震台网(CDSN)单台站P波偏振分析

doi:10.12196/j.issn.1000-3274.2020.04.004

Abstract

Abstract: Polarization analysis can quantitatively describe the particles motion of seismic wave. The horizontal polarization of initial P particle motion can deviate from the great circle azimuth from station to source. P wave polarization data may provide constraints on subsurface structure an anisotropy different from those travel times and shear wave splitting. We use principle component analysis method to calculate P wave polarization of a seismic station, together with a harmonic analysis for the anisotropy beneath the receiver. In the principle component analysis, we take the singular value decomposition algorithm. Four seismic stations of China Digital Seismograph Network (CDSN) are investigated by this method. We analyze particle motions of teleseismic P wave records, fitting the sine curves and estimate the fast directions of anisotropy of single station of LSA and KMI stations. The fast direction of LSA is 66°, and the fast direction of KMI is 57°.

Key words: P wave polarization, CDSN, Principal Components Analysis, Anisotropy

CLC Number:

P315.7

CHEN Yan-han, WU Qing-ju. P Wave Polarization Analysis on Part CDSN[J]. EARTHQUAKE, 2020, 40(4): 49-62.

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P Wave Polarization Analysis on Part CDSN

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