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    Volume 40 Issue 10
    Oct.  2015
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    Article Navigation >  Earth Science  > 2015  >  40(10): 1741-1754
    Xu Fukun, Liu Zifeng, Zhang Zhuqi, Li Jing, Liu Lifang, Su Youjin, 2015. Double Difference Relocation and Focal Mechanisms of the Jinggu Ms6.6 Earthquake Sequences in Yunnan Province in 2014. Earth Science, 40(10): 1741-1754. doi: 10.3799/dqkx.2015.156
    Citation: Xu Fukun, Liu Zifeng, Zhang Zhuqi, Li Jing, Liu Lifang, Su Youjin, 2015. Double Difference Relocation and Focal Mechanisms of the Jinggu Ms6.6 Earthquake Sequences in Yunnan Province in 2014. Earth Science, 40(10): 1741-1754. doi: 10.3799/dqkx.2015.156
    shu

    Double Difference Relocation and Focal Mechanisms of the Jinggu Ms6.6 Earthquake Sequences in Yunnan Province in 2014

    doi: 10.3799/dqkx.2015.156
    • 1.

      Yunnan Earthquake Administration, Kunming 650204, China

    • 2.

      Institute of Geology, China Earthquake Administration, Beijing 100029, China

    • Received Date: 2015-02-13
    • Publish Date: 2015-10-15
      Abstract
    • The research of Yunnan Jinggu earthquake is not so intensive. To discuss the seismogenic structure and distribution of sequences of Jinggu Ms6.6 earthquake, 7 October 2014, we relocated the mainshock by using the 3D velocity model of Yunnan and Sichuan province (Loc3dSB), and then relocated the sequences during 7th to 31th October 2014 using the double-difference relocation algorithm, by using and phase data from seismic network of Yunnan province. Furthermore the focal mechanism solutions are derived by using P-wave polarity first-motion and amplitude ratio method. The sequences appear to be strike-slip type mostly, with the principal compressive stress axis trends both NNE and NE directions. And the sequences are distributed dominantly linearly shaped in the NW direction with its southeast endpoint appears deeper than northwest. Both of which indicate that the early major rupture plane is the NW nodal plan, appears to be a right-lateral strike-slip faulting with a small normal component. Meanwhile the linearly shaped distribution and focal mechanisms varies with locations on different segments, with clear end-points and transform segment. Furthermore, aftershocks at SE end-point expand gradually to new geometrically unclear segment, which may indicate another rupture.

       

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