The 2007 Ali Earthquake Inversion from Ascending and Descending InSAR Observations

The 2007 Ali Earthquake Inversion from Ascending and Descending InSAR Observations

On 5th May, 2007, a <i>M</i><sub>w</sub>6.1 earthquake occurred in the Ali region, China. In this study, ascending and descending tracks of ASAR images collected by Envisat satellite are employed to derive the precise coseismic surface displacements, then nonlinear MPSO algor...

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Main Authors: WEN Yangmao, XU Caijun, LIU Yang, FENG Wanpeng, LI Zhicai
Format: Article
Language:zho
Published: Surveying and Mapping Press 2015-06-01
Series:Acta Geodaetica et Cartographica Sinica
Subjects:
Ali earthquake
InSAR
slip distribution inversion
focal mechanism
Online Access:http://html.rhhz.net/CHXB/html/2015-6-649.htm
id doaj-d9c6a24095254ab8b45fe5dc1b6a9625
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spelling doaj-d9c6a24095254ab8b45fe5dc1b6a96252020-11-24T21:23:53ZzhoSurveying and Mapping PressActa Geodaetica et Cartographica Sinica1001-15951001-15952015-06-0144664965410.11947/j.AGCS.2015.2014034920150608The 2007 Ali Earthquake Inversion from Ascending and Descending InSAR ObservationsWEN Yangmao0XU Caijun1LIU Yang2FENG Wanpeng3LI Zhicai4School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;School of Geographical and Earth Sciences, University of Glasgow, Glasgow G12 8QQ, UK;Department of Geodesy, National Geomatics Center of China, Beijing 100048, ChinaOn 5th May, 2007, a <i>M</i><sub>w</sub>6.1 earthquake occurred in the Ali region, China. In this study, ascending and descending tracks of ASAR images collected by Envisat satellite are employed to derive the precise coseismic surface displacements, then nonlinear MPSO algorithm and linear least-square method with elastic half-space dislocation model are used to estimate the fault geometry and coseismic slip distribution. Our model suggests that the distributed slip mode can fit the observations very well. The earthquake fault is a normal fault with a strike of 158&#176;, a dip of 43&#176; and dipping to southwest. The slip mainly occurs within 7~12 km along the orientation, with a maximum slip of 0.3 m at a depth of 9 km. The determined geodetic moment is 1.24&#215;10<sup>18</sup> Nm, which is consistent with seismological results.http://html.rhhz.net/CHXB/html/2015-6-649.htmAli earthquakeInSARslip distribution inversionfocal mechanism
collection DOAJ
language zho
format Article
sources DOAJ
author WEN Yangmao
XU Caijun
LIU Yang
FENG Wanpeng
LI Zhicai
spellingShingle WEN Yangmao
XU Caijun
LIU Yang
FENG Wanpeng
LI Zhicai
The 2007 Ali Earthquake Inversion from Ascending and Descending InSAR Observations
Acta Geodaetica et Cartographica Sinica
Ali earthquake
InSAR
slip distribution inversion
focal mechanism
author_facet WEN Yangmao
XU Caijun
LIU Yang
FENG Wanpeng
LI Zhicai
author_sort WEN Yangmao
title The 2007 Ali Earthquake Inversion from Ascending and Descending InSAR Observations
title_short The 2007 Ali Earthquake Inversion from Ascending and Descending InSAR Observations
title_full The 2007 Ali Earthquake Inversion from Ascending and Descending InSAR Observations
title_fullStr The 2007 Ali Earthquake Inversion from Ascending and Descending InSAR Observations
title_full_unstemmed The 2007 Ali Earthquake Inversion from Ascending and Descending InSAR Observations
title_sort 2007 ali earthquake inversion from ascending and descending insar observations
publisher Surveying and Mapping Press
series Acta Geodaetica et Cartographica Sinica
issn 1001-1595
1001-1595
publishDate 2015-06-01
description On 5th May, 2007, a <i>M</i><sub>w</sub>6.1 earthquake occurred in the Ali region, China. In this study, ascending and descending tracks of ASAR images collected by Envisat satellite are employed to derive the precise coseismic surface displacements, then nonlinear MPSO algorithm and linear least-square method with elastic half-space dislocation model are used to estimate the fault geometry and coseismic slip distribution. Our model suggests that the distributed slip mode can fit the observations very well. The earthquake fault is a normal fault with a strike of 158&#176;, a dip of 43&#176; and dipping to southwest. The slip mainly occurs within 7~12 km along the orientation, with a maximum slip of 0.3 m at a depth of 9 km. The determined geodetic moment is 1.24&#215;10<sup>18</sup> Nm, which is consistent with seismological results.
topic Ali earthquake
InSAR
slip distribution inversion
focal mechanism
url http://html.rhhz.net/CHXB/html/2015-6-649.htm
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