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

IF 1.9 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

pure and applied geophysics Pub Date : 2025-03-14 DOI:10.1007/s00024-025-03694-2

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

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Abstract

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.

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基于多源遥感技术的2016年熊本Mw 7.1地震形变场特征分析

对熊本地震进行分析，主要以InSAR数据结合强震和GNSS数据为基础，采用多种InSAR联合方法和多源数据求解方法，综合考虑多源数据的归一化和加权。确定三维（3D）变形场。结果表明，多源数据联合解能在一定程度上提高三维解变形结果的精度。根据三维解算结果，2016年熊本地震造成的最大东西变形量约为2 m；南北方向主要表现为膨胀和拉伸；西北侧垂直沉降，最大沉降2 m；东南侧隆起。水平变形特征表明地震以右侧走滑为主；走向为北东—西南向，双川断层具有若干正断层性质。通过对同震三维变形场的分析，可以更好地了解发震断裂，为研究地震机理提供基础。

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来源期刊

pure and applied geophysics 地学-地球化学与地球物理

CiteScore

4.20

自引率

5.00%

发文量

240

审稿时长

9.8 months

期刊介绍： pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.