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Preprints
https://doi.org/10.5194/nhess-2020-408
https://doi.org/10.5194/nhess-2020-408

  06 Jan 2021

06 Jan 2021

Review status: this preprint is currently under review for the journal NHESS.

Three-dimensional deformation field analysis of the 2016 Kumamoto Mw 7.1 earthquake

Qingyun Zhang1, Jingfa Zhang2, Yongsheng Li2, Bingqun Li2, Quancai Xie3,4, Sanming Luo1, and Qingzun Ma1 Qingyun Zhang et al.
  • 1The First Monitoring and Application Center, China Earthquake Administration, Tianjin, China
  • 2National Institute of Natural Hazards, MEMC, Beijing, China
  • 3Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China
  • 4Earthquake Administration, Harbin, 150080, China

Abstract. The Kumamoto earthquake is analyzed mainly with InSAR data combined with strong earthquake and GPS data, using a variety of joint InSAR technology methods and multisource data solution methods and comprehensively considering the normalization and weighting of multisource data. The three-dimensional (3D) deformation field is determined. The results show that the joint solution of multisource data can improve the accuracy of the 3D solution deformation results to a certain extent. From the 3D solution results, the maximum east-west deformation caused by the 2016 Kumamoto earthquake is approximately 2 m; the north-south direction mainly manifests expansion and stretching; the northwestern side subsides vertically, with a maximum subsidence of 2 m; and the southeastern side is uplifted. The horizontal deformation characteristics show that the earthquake is dominated by right-lateral strike-slip; the strike is NE-SW, the dip of the seismogenic fault is nearly vertical, and the Futagawa fault has a few normal fault properties. By analyzing the coseismic 3D deformation field, the seismogenic fault can be better understood, which provides a foundation for studying seismic mechanisms.

Qingyun Zhang et al.

Status: open (until 17 Feb 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on nhess-2020-408', Sylvain Barbot, 16 Jan 2021 reply

Qingyun Zhang et al.

Qingyun Zhang et al.

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