Acta Seismologica Sinica

, Volume 21, Issue 2, pp 127–138 | Cite as

Shear-wave splitting of Sichuan Regional Seismic Network

  • Yong-jiu Zhang (张永久)Email author
  • Yuan Gao (高原)
  • Yu-tao Shi (石玉涛)
  • Wan-zheng Cheng (程万正)


Using seismic data recorded by the Chengdu Digital Seismic Network from May 1, 2000 to December 31, 2006, we obtain the dominant polarization directions of fast shear-waves at eight digital seismic stations adopting the SAM technique. The results show that the dominant directions of polarizations of fast shear-waves at most of stations are mainly in nearly NE-SW or NW-SE direction in Sichuan. The dominant polarization directions of the fast shear-waves at stations located at the active faults or intersection of several active faults are consistent with the strikes of active faults which control the earthquakes used in the analysis, and are basically consistent with the directions of regional compression axis. However, several stations show that the fast shear-waves are not consistent with the strikes of active faults and the directions of regional compression axis, due to the influence of local complicated crustal structure.

Key words

shear-wave splitting polarization of fast shear-wave compression axis active fault Sichuan region 

CLC number



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Copyright information

© Seismological Society of China and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Yong-jiu Zhang (张永久)
    • 1
    Email author
  • Yuan Gao (高原)
    • 2
  • Yu-tao Shi (石玉涛)
    • 2
  • Wan-zheng Cheng (程万正)
    • 1
  1. 1.Earthquake Administration of Sichuan ProvinceChengduChina
  2. 2.Institute of Earthquake ScienceChina Earthquake AdministrationBeijingChina

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