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<p>The Kumamoto earthquake is analyzed, mainly on the basis of InSAR data combined with strong earthquake and <span>GNSS</span> data, using a variety of joint InSAR methods and multisource data solution methods and by comprehensively considering the normalization and weighting of multisource data. The three-dimensional (3D) deformation field is determined. The results show that the joint solution with multisource data can improve the accuracy of the 3D solution deformation results to a certain extent. According to the 3D solution results, the maximum east–west deformation caused by the 2016 Kumamoto earthquake was approximately 2&#xa0;m; the manifestations in the north–south direction were mainly characterized by expansion and stretching; the northwestern side subsided vertically, with a maximum subsidence of 2&#xa0;m; and the southeastern side was uplifted. The horizontal deformation characteristics reveal that the earthquake was dominated by right-lateral strike-slip; the strike was NE–SW oriented, and the Futagawa fault has several normal fault properties. By analyzing the co-seismic 3D deformation field, seismogenic faults can be better understood, which provides a foundation for studying seismic mechanisms.</p>

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Analysis of Deformation Field Characteristics from the 2016 Kumamoto Mw 7.1 Earthquake Based on Multisource Remote Sensing Technology

  • 期刊论文

  • 发表日期：

    2025年3月14日

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  • Qingyun Zhang,
  • Jingfa Zhang,
  • Yongsheng Li,
  • Bingquan Li,
  • Quancai Xie,
  • Sanming Luo

摘要

The Kumamoto earthquake is analyzed, mainly on the basis of InSAR data combined with strong earthquake and GNSS data, using a variety of joint InSAR methods and multisource data solution methods and by comprehensively considering the normalization and weighting of multisource data. The three-dimensional (3D) deformation field is determined. The results show that the joint solution with multisource data can improve the accuracy of the 3D solution deformation results to a certain extent. According to the 3D solution results, the maximum east–west deformation caused by the 2016 Kumamoto earthquake was approximately 2 m; the manifestations in the north–south direction were mainly characterized by expansion and stretching; the northwestern side subsided vertically, with a maximum subsidence of 2 m; and the southeastern side was uplifted. The horizontal deformation characteristics reveal that the earthquake was dominated by right-lateral strike-slip; the strike was NE–SW oriented, and the Futagawa fault has several normal fault properties. By analyzing the co-seismic 3D deformation field, seismogenic faults can be better understood, which provides a foundation for studying seismic mechanisms.