XU Caijung, ZHOU Lixuan, YIN Zhi. Construction and Geodesy Slip Inversion Analysis of 2013 Ms 7.0 Lushan in China Earthquake's Curved Fault Model[J]. Geomatics and Information Science of Wuhan University, 2017, 42(11): 1665-1672. DOI: 10.13203/j.whugis20160040
Citation: XU Caijung, ZHOU Lixuan, YIN Zhi. Construction and Geodesy Slip Inversion Analysis of 2013 Ms 7.0 Lushan in China Earthquake's Curved Fault Model[J]. Geomatics and Information Science of Wuhan University, 2017, 42(11): 1665-1672. DOI: 10.13203/j.whugis20160040

Construction and Geodesy Slip Inversion Analysis of 2013 Ms 7.0 Lushan in China Earthquake's Curved Fault Model

  • Based on the distribution of aftershock sequences and the geology of Lushan, using the GPS and level measurement coseismal displacement data near the Lushan Earthquake, we constructed a curved fault model of the 2013 Ms 7.0 Lushan earthquake using the grid search and variance component estimation method. We executed a fault slip distribution inversion based on this curved fault model. The result shows that the fault is mainly a thrust fault with a sinistral trend. The earthquake occurred at 4.56~18.25 km in depth, the maximum slip was 0.70 m at the 12.64 km depth, and the corresponding seismic moment release was 8.77×1018N/m, equivalent to a Mw 6.57 earthquake. Based on a check board test of the curved fault model, we can distinguish an asperity shallower than 13 km in the fault depth, with a minimum area of 8 km×8 km.
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