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Volume 26 Issue 3
Jul 2015
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Journal of Earth Science  > 2015  >  26(3): 384-390.
Chengli Liu, Yong Zheng, Xiong Xiong. Focal mechanism and rupture process of the 2012 Mw 7.0 Santa Isabel, Mexico earthquake inverted by teleseismic data. Journal of Earth Science, 2015, 26(3): 384-390. doi: 10.1007/s12583-014-0503-x
Citation: Chengli Liu, Yong Zheng, Xiong Xiong. Focal mechanism and rupture process of the 2012 Mw 7.0 Santa Isabel, Mexico earthquake inverted by teleseismic data. Journal of Earth Science, 2015, 26(3): 384-390. doi: 10.1007/s12583-014-0503-x
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Focal mechanism and rupture process of the 2012 Mw 7.0 Santa Isabel, Mexico earthquake inverted by teleseismic data

doi: 10.1007/s12583-014-0503-x

  • State Key Laboratory of Geodesy and Earth's Dynamic, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China

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  • Corresponding author: Chengli Liu, lcl8669@126.com
  • Received Date: 14 Mar 2014
  • Accepted Date: 08 Jul 2014
  • Publish Date: 01 Jun 2015
    Abstract
  • The point source parameters of the April 12, 2012 Mw 7.0 Santa Isabel, Mexico, earthquake indicated by teleseismic P and SH waveforms obtained by a means of traditional cut and paste (CAP) method show that the best double-couple solution of this event is: 37°/127°, 90°/81° and −9°/−180° for strike, dip and rake, respectively. Its centroid depth is 13 km. Global teleseismic waveform data exhibit that the rupture of the earthquake initiated at a focal depth of 13 km and propagated southeastward with a relatively slow rupture velocity (about 1.8 km/s on average). The maximum slip occurred at 30 km southeast of the hypocenter, with the peak slip of 3.57 m and total seismic moment of whole fault up to 3.98×1019 N·m. These observations provide some insight into properties, co- or post-seismic deformation and coulomb stress changes of future earthquake in this area.

     

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