|Table of Contents|

Review on InSAR-derived Coseismic Deformation and the Determination of Earthquake Source Parameters(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2021年第03期
Page:
604-620
Research Field:
地球信息科学
Publishing date:

Info

Title:
Review on InSAR-derived Coseismic Deformation and the Determination of Earthquake Source Parameters
Author(s):
JI Ling-yun1; 2;  ZHU Liang-yu2;  LIU Chuan-jin2;  ZHANG Wen-ting2; QIU Jiang-tao2;  XU Xiao-xue2
(1. School of Earth Sciences, Institute of Disaster Prevention, Sanhe 065201, Hebei, China; 2. The Second Monitoring and Application Center of China Earthquake Administration, Xi'an 710054, Shaanxi, China)
Keywords:
geodesy;  earthquake;  InSAR;  fault movement;  inversion;  earthquake source parameter;  three-dimension deformation;  fault model
PACS:
P22
DOI:
10.19814/j.jese.2020.12047
Abstract:
Interferometry synthetic aperture radar(InSAR), which is a spatial geodetic technique developed at 1970s, has the advantages of all day and night, all weather, high-precision and wide area coverage. Owing to these advantages, InSAR has been widely used in the area of coseismic deformation detection from 1990s, and is helpful for studying the mechanism of earthquake significantly. In particular, the coseismic crustal deformation observed by InSAR can be used as an important constraint to analyze the geometric characteristics and dynamic mechanism of seismogenic faults. With the continuous improvement of InSAR, how to obtain the coseismic deformation field more reliably and how to build a more real and efficient forward and inverse model are the keys to use InSAR to study earthquakes. The advantages and disadvantages of detecting coseismic deformation using InSAR, and overview of 3D coseismic deformation using InSAR, were firstly reviewed. Then, an overview of inversion for source parameters on a seismogenic fault was analyzed comprehensively, including the elastic half-space fault model, numerical model with anisotropic medium, inversion methods, and a priori constraints. Finally, the separation of deformation caused by several earthquakes, and automatic InSAR data processing and seismogenic fault parameters inversion were prospected. It is concluded that the InSAR-derived coseismic deformation field has the advantage of large-area and high-precision. InSAR can achieve precise earthquake source parameters combining seismology methods.

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Last Update: 2021-05-01