[1]LI Zhenling,JIN Mingpei,MIAO Suqiu.Slip Model and Co-seismic Displacement Field of the 2021 Yangbi,Yunnan MS6.4 Earthquake[J].Journal of Seismological Research,2021,44(03):330-337.
Copy
Slip Model and Co-seismic Displacement Field of the 2021 Yangbi,Yunnan MS6.4 Earthquake
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
44
Number of periods:
2021 03
Page number:
330-337
Column:
Public date:
2021-10-20
- Title:
- Slip Model and Co-seismic Displacement Field of the 2021 Yangbi,Yunnan MS6.4 Earthquake
- Keywords:
- near-source strong motion; automatic empirical baseline correction; GPS; co-seismic displacement; slip model; InSAR; the Yangbi MS6.4 earthquake
- CLC:
- P315.72
- DOI:
- -
- Abstract:
- On the basis of the near-field strong motion records within 40 km around the epicenter of the Yangbi MS6.4 earthquake in Yunnan on May 21,2021,we used an improved automatic empirical baseline correction method to estimate the co-seismic displacement.We analyzed the characteristics of strong motion and GPS co-seismic displacement field.We inverted independently and jointly the source slip model using GPS data and InSAR ascending-and descending-orbit data,and further proposed the distribution of the predicted,full-space,co-seismic displacement field based on the slip model.The results showed that:(1)The horizontal co-seismic displacement field showed that the fault dislocation was dominated by right-lateral strike-slip.(2)The static slip range of the source obtained by independent-and joint-inversion of GPS and InSAR was basically the same.The maximum slip occurred in the south of the epicenter.The maximum slips of the source by the 6 models were respectively 0.74 m,0.66 m,0.44 m,0.45 m,0.47 m and 0.47 m.The inverted MW ranged from 5.9 to 6.3.(3)The predicted,full-space,horizontal,co-seismic displacement field of the Yangbi earthquake by the slip model was in good agreement with the observed,horizontal,co-seismic displacement field.The north and south parts of the epicenter were compressing inward,while the east and west parts were stretching outward.This was consistent with the characteristics of the co-seismic displacement field produced by a strike-slip earthquake.
- References:
-
常祖峰,张艳凤,周青云,等.2014.2013年洱源MS5.5地震烈度分布及震区活动构造背景研究[J].中国地震,30(4):560-570.
黄星.2020.InSAR和GPS技术在震间和同震形变领域的应用研究[D].北京:中国地震局地震预测研究所.
金明培,黎朕灵,汪荣江.2017.日本熊本MW7.0地震同震位移场和震源滑动模型反演[J].地震学报,39(6):819-830.
金明培,汪荣江,屠泓为.2014.芦山7级地震的同震位移估计和震源滑动模型反演尝试[J].地球物理学报,57(1):129-137.
金明培,汪荣江.2013.用近场强震动记录快速估计同震位移并反演震源滑动分布[J].地球物理学报,56(4):1207-1215.
黎朕灵,金明培,缪素秋.2020.2016年8月24日意大利佩鲁贾MW6.2级地震同震位移场估计和震源滑动模型反演[J].地球物理学进展,35(1):32-39.
李传友,张金玉,王伟.2021.2021年云南漾濞MS6.4地震发震构造分析[J].地震地质,43(3):706-721.
毛玉平,韩新民,谷一山,等.2003.云南地区强震(M≥6)研究[M].昆明:云南科技出版社.
潘睿,姜金钟,付虹,等.2019.2017年云南漾濞MS5.1及MS4.8地震震源机制解和震源深度测定[J].地震研究,42(3):338-348.
申文豪,李永生,焦其松,等.2019.联合强震记录和InSAR/GPS结果的四川九寨沟7.0级地震震源滑动分布反演及其地震学应用[J].地球物理学报,62(1):115-129.
屠泓为,汪荣江,刁法启,等.2016.运用SDM方法研究2001年昆仑山口西MS8.1地震破裂分布:GPS和InSAR联合反演的结果[J].地球物理学报,59(6):2103-2112.
王永哲.2015.利用GPS和InSAR数据反演2011年日本东北MW9.0地震断层的同震滑动分布[J].地震学报,37(5):796-805,885.
温少妍,单新建,张国宏,等.2018.基于InSAR和远场地震波联合反演2008年MW6.3大柴旦地震震源破裂过程[J].地球物理学报,61(6):2301-230.
杨军,苏有锦,陈佳,等.2014.利用CAP方法快速计算云南地区中小地震震源机制解[J].中国地震,30(4):551-559.
张华英,杨建文,高琼.2021.2021 年漾濞MS6.4 级地震前兆异常分析[J].华南地震,41(2):176-182.
张勇.2010.地震破裂过程反演及其在大地震应急中的应用研究[D].北京:中国地震局地球物理研究所.
Chao W A,Wu Y M,Zhao L.2010.An automatic scheme for baseline correction of strong-motion records in coseismic deformation determination[J].Journal of Seismology,14(3):495-504.
Diao F,Xiong X,Wang R J.2011.Mechanisms of transient postseismic deformation following the 2001 MW7.8 Kunlun(China)Earthquake[J].Pure and Applied Geophysics,168(5):767-779.
Diao F,Xiong X,Wang R,et al.2010.Slip model of the 2008 MW7.9 Wenchuan(China)earthquake derived from co-seismic GPS data[J].Earth Planets & Space,62(11):869-874.
Feng G,Ding X,Li Z,et al.2012.Calibration of an InSAR-derived coseimic deformation map associated with the 2011 MW9.0 Tohoku-Oki Earthquake[J].IEEE Geoscience and Remote Sensing Letters,9(2):302-306.
Ge L,Zhang K,Ng A H,et al.2008.Preliminary results of satellite radar differential interferometry for the Co-seismic Deformation of the 12 May 2008 MS8.0 Wenchuan earthquake[J].Geographic Information Sciences,14(1):12-19.
Hu J,Li Z W,Ding X L,et al.2013.Derivation of 3-D coseismic surface displacement fields for the 2011 MW9.0 Tohoku-Oki earthquake from InSAR and GPS measurements[J].Geophysical Journal International,192(2):573-585.
Iwan W D.Moser M A,Peng C Y.1985.Some observations on strong-motion earthquake measurement using a digital accelerograph[J].Bulletin of the Seismological Society of America,75(5):1225-1246.
Ozawa S,Nishimura T,Suito H,et al.2011.Coseismic and postseismic slip of the 2011 magnitude-9 Tohoku-Oki earthquake[J].Nature.
Wang C,Ding X,Shan X,et al.2012.Slip distribution of the 2011 Tohoku earthquake derived from joint inversion of GPS,InSAR and seafloor GPS/acoustic measurements[J].Journal of Asian Earth Sciences,57(6):128-136.
Wang L,Wang R,Roth F,et al.2009.Afterslip and viscoelastic relaxation following the 1999 M7.4 Izmit earthquake from GPS measurements[J].Geophysical Journal International,178(3):1220-1237.
Wang R J,Motagh M,Walter T R.2008.Inversion of slip distribution from coseismic deformation data by a sensitivity-based iterative fitting(SBIF)method//EGU General Assembly 2008.Vienna,Austria:EGU.
Wang R J,Schurr B,Milkereit C,et al.2011.An improved automatic scheme for empirical baseline correction of digital strong-motion records[J].Bulletin of the Seismological Society of America,101(5):2029-2044.
Wu Y M,Wu C F.2007.Approximate recovery of coseismic deformation from Taiwan strong-motion records[J].Journal of Seismology,11(2):159-170.
Xu C,Liu Y,Wen Y,et al.2010.Coseismic slip distribution of the 2008 MW7.9 Wenchuan earthquake from joint inversion of GPS and InSAR data[J].Bulletin of the Seismological Society of America,100(5B):2736-2749.
- Similar References:
Memo
-
Last Update:
2021-10-20