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Li Feng, Li Yingchun, Li Qiang, Feng Zhisheng, Wang Junfei. 2017: Focal mechanism of the Sheyang MS4.4 earthquake on October 20, 2016 and the spatio-temporal distribution of the earthquake sequence. Acta Seismologica Sinica, 39(5): 659-668. DOI: 10.11939/jass.2017.05.003
Citation: Li Feng, Li Yingchun, Li Qiang, Feng Zhisheng, Wang Junfei. 2017: Focal mechanism of the Sheyang MS4.4 earthquake on October 20, 2016 and the spatio-temporal distribution of the earthquake sequence. Acta Seismologica Sinica, 39(5): 659-668. DOI: 10.11939/jass.2017.05.003
shu

Focal mechanism of the Sheyang MS4.4 earthquake on October 20, 2016 and the spatio-temporal distribution of the earthquake sequence

  • 1.

    Earthquake Administration of Jiangsu Province, Nanjing 210014, China

  • 2.

    Earthquake Administration of Fujian Province, Fuzhou 350003, China

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  • Received Date: December 04, 2016
  • Revised Date: May 22, 2017
  • Published Date: August 31, 2017
    Graphical Abstract
    • Abstract
  • Based on the digital waveforms of Jiangsu seismic network, the focal mechanism of the Sheyang MS4.4 earthquake was determined by using the CAP (cut and paste) method, and the ML≥1.5 events of Sheyang earthquake sequence were relocated by using the HypoDD method. The result shows that the strike, dip and rake of the MS4.4 event are 304°, 53°, 0° for the nodal plane Ⅰ, and 214°, 90°, 143° for the nodal plane Ⅱ, respectively, and the centroid depth is about 14 km. The relocation for the Sheyang earthquake sequence shows that the earthquake sequence was located between Hongze-Goudun fault and Yancheng-Nanyang'an fault with the predominant direction NW60° in horizontal space, and the sequence propagated from southeast to northwest with the focal depth of 6--23 km. According to the focal mechanism solutions and the relocation results, we deduce that the Sheyang MS4.4 earthquake is a left-lateral slip event induced by shear rupture northwestwards under regional stress field, and its fault plane is nodal plane Ⅰ.
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    • References (36)
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