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Volume 28 Issue 2
Apr 2017
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Journal of Earth Science  > 2017  >  28(2): 404-410.
Jun Li, Chengli Liu, Yong Zheng, Xiong Xiong. Rupture Process of the Ms 7.0 Lushan Earthquake Determined by Joint Inversion of Local Static GPS Records, Strong Motion Data, and Teleseismograms. Journal of Earth Science, 2017, 28(2): 404-410. doi: 10.1007/s12583-017-0757-1
Citation: Jun Li, Chengli Liu, Yong Zheng, Xiong Xiong. Rupture Process of the Ms 7.0 Lushan Earthquake Determined by Joint Inversion of Local Static GPS Records, Strong Motion Data, and Teleseismograms. Journal of Earth Science, 2017, 28(2): 404-410. doi: 10.1007/s12583-017-0757-1
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Rupture Process of the Ms 7.0 Lushan Earthquake Determined by Joint Inversion of Local Static GPS Records, Strong Motion Data, and Teleseismograms

doi: 10.1007/s12583-017-0757-1
  • 1.

    State Key Laboratory of Geodesy and Earth's Dynamics, Institute of Geodesy and Geophysics, CAS, Wuhan 430077,China

  • 2.

    Hubei Subsurface Multi-Scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074,China

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    Abstract
  • On April 20, 2013, an Ms 7.0 earthquake struck Lushan County in Sichuan Province, China, and caused serious damage to the source region. We investigated the rupture process of the Ms7.0 Lushan earthquake by jointly inverting waveforms of teleseismic P waveforms and local strong motion records as well as static GPS observations. The inverted results indicate that the rupture of this earthquake was dominated by the failure of an asperity with a triangular shape and that the main shock was dominated by thrust slip. The earthquake released a total seismic moment of 1.01×10 19 Nm, with 92% of it being released during the first 11 s. The rupture had an average slip of 0.9 m and produced an average stress drop of 1.8 MPa. Compared with our previous work that was based mainly on a unique dataset, this joint inversion result is more consistent with field observations and the distribution of aftershock zones.

     

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