Co-seismic slip distribution of the 2011 Tohoku(MW 9.0)earthquake inverted from GPS and space-borne gravimetric data-中国期刊网

摘要 DataobtainedbyGRACE(GravityRecoveryandClimateExperiment)havebeenusedtoinvertfortheseismicsourceparametersofmegathrustearthquakesundertheassumptionofeitheruniformslipoveranentirefaultorapoint-likeseismicsource.Herein,wefurtherextendtheinversionofGRACElong-wavelengthgravitychangestoheterogeneousslipdistributionsduringthe2011Tohokuearthquakeusingthreefaultmodels:(I)aconstant-strikeandconstant-dipfault,(II)avariabledipfault,and(III)arealisticallyvaryingstrikefault.Byremovingthepost-seismicsignalfromthetimeseries,andtakingtheeffectofoceanwaterredistributionintoaccount,weinvertforslipmodelsI,II,andIIIusingco-seismicgravitychangesmeasuredbyGRACE,de-stripedbyDDK3decorrelationfilter.Thetotalseismicmomentsofourslipmodels,withrespectivevaluesof4.9×1022Nm,5.1×1022Nm,and5.0×1022Nm,aresmallerthanthoseobtainedbyotherstudiesrelyingonGRACEdata.Theresultingcentroidsarealsolocatedatgreaterdepths(20km,19.8km,and17.4km,respectively).BycombiningonshoreGPS,GPS-Acoustic,andGRACEdata,weobtainajointlyinvertedslipmodelwithaseismicmomentof4.8×1022Nm,whichislargerthantheseismicmomentobtainedusingonlytheGPSdisplacements.Weshowthattheslipinvertedfromlowdegreespace-bornegravimetricdata,whichcontainsinformationattheoceanregion,isaffectedbythestrikeofthearcuatetrench.Thespace-bornegravimetricdatahelpusconstrainthesourceparametersofamegathrustearthquakewithintheframeofheterogeneousslipmodels.

1Dimitar Ouzounov;Sergey Pulinets;Alexey Romanov;Alexander Romanov;Konstantin Tsybulya;Dmitri Davidenko;Menas Kafatos;Patrick Taylor. Atmosphere-ionosphere response to the M9 Tohoku earthquake revealed by multiinstrument space-borne and ground observations： Preliminary results.地震学,2011-06.
2Masayoshi Nakashima;Oren Lavan;Masahiro Kurata;Yunbiao Luo. Earthquake engineering research needs in light of lessons learned from the 2011 Tohoku earthquake.地震学,2014-06.
3李进;申文斌. Investigation of the Co-seismic Gravity Field Variations Caused by the 2004 Sumatra-Andaman Earthquake Using Monthly GRACE Data.地质学,2011-02.
4Zhang Li;Su Youjin;Luo Ruijie;Gao Wenfei;Zhang Ping. The Co-seismic Response of Underground Fluid in Yunnan to the Nepal MS8.1 Earthquake.地震学,2017-02.
5Honglin Jin Hui Wang. Estimation of the 2001 Kunlun earthquake fault slip from GPS coseismic data using Hori＇s inverse method.地震学,2009-06.
6WU;Zhong-liang(吴忠良). Distribution of slip along an earthquake fault.地震学,2004-05.
7Gu Guohua;Wang Wuxing. Pre-seismic and Co-seismic Crustal Movements of the M 7.3 Kyushu Earthquake on April 16, 2016 in Japan.地震学,2017-04.
8马超;单新建. Decomposing InSAR LOS displacement into co-seismic dislocation with a linear interpolation model： A case study of the Kunlun Mountain Ms=8.1 earthquake.地震学,2006-01.
9Jie Dong;Wenke Sun. Internal co-seismic deformation and curvature effect based on an analytical approach.地震学,2017-01.
10Gu Shenyi Liu Yang Zhang Hui Xie Xiaojing Ye Xiangding. Analysis on the Characteristics of the Co-seismic Response of Water Levels in the Jiaji Well.地震学,2012-01.

Co-seismic slip distribution of the 2011 Tohoku(MW 9.0)earthquake inverted from GPS and space-borne gravimetric data

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Co-seismic slip distribution of the 2011 Tohoku(MW 9.0)earthquake inverted from GPS and space-borne gravimetric data

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