Article(id=1322916787519619163, tenantId=1146029695717560320, journalId=1281212831689347082, issueId=1322916705915249052, articleNumber=null, orderNo=null, doi=10.14075/j.jgg.2025.10.349, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1760457600000, receivedDateStr=2025-10-15, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793337540749, onlineDateStr=2026-10-30, pubDate=1784044800000, pubDateStr=2026-07-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793337540749, onlineIssueDateStr=2026-10-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793337540749, creator=13701087609, updateTime=1793337540749, updator=13701087609, issue=Issue{id=1322916705915249052, tenantId=1146029695717560320, journalId=1281212831689347082, year='2026', volume='46', issue='7', pageStart='790', pageEnd='912', issueExtLink='null', onlineDate='null', pubDate='1784044800000', pubDateStr='2026-07-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793337521294, creator='13701087609', updateTime=1793337521294, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=903, endPage=912, ext={EN=ArticleExt(id=1322916787809026140, articleId=1322916787519619163, tenantId=1146029695717560320, journalId=1281212831689347082, language=EN, title=Lateral Variations in Mantle Structure beneath the Sumatra Region Based on the VISCO2.5D Model, columnId=null, journalTitle=Journal of Geodesy and Geodynamics, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Based on a two-dimensional viscoelastic spherical Earth model, this study constrains the mantle viscosity structure beneath the Sumatra region using GRACE RL06 satellite data and the VISCO2.5D code. The aim is to reveal the spatiotemporal characteristics of co- and post-seismic gravity changes induced by the 2004 Sumatra MW9.3 earthquake and to analyze the lateral variation information of mantle viscosity contained within the gravity signals. GRACE satellite gravity observations were processed through filtering and smoothing to isolate the co- and post-seismic gravity change signals associated with the 2004 event. The extracted signal exhibits a negative-positive-negative pattern from southwest to northeast (Indian ocean-Sumatra-Malaysia). During the observation period from 2005 to 2012, the magnitude of post-seismic gravity change was comparable to the co-seismic change, with a maximum negative change of -3.7 μGal and a maximum positive change of 8.3 μGal. Considering the influence of the subducting slab near the trench, the observed large-scale co-and post-seismic gravity changes were simulated using the 2D viscoelastic Earth model and the spectral-element method in VISCO2.5D. The results show that when the mantle viscosity coefficients are set to 2×1019 Pa·s on the oceanic side and 1×1019 Pa·s on the continental side of the seismogenic fault, with a subducting slab near the trench and an elastic lithospheric thickness of 60 km, the simulated post-seismic gravity changes closely match the GRACE observations. This indicates that the post-seismic gravity changes in the Sumatra region are primarily driven by mantle viscoelastic relaxation, with a negligible contribution from aftershock effects.
, authors=Haoyang ZHANG
1, 2, Guangyu FU
1, 2, *, Tai LIU
3, authorsList=Haoyang ZHANG, Guangyu FU, Tai LIU, authorCompany=null, correspAuthors=Guangyu FU, authorNote=null, correspAuthorsNote=null, copyrightStatement=
All rights reserved. Unauthorized reproduction is prohibited., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322916793001574517, articleId=1322916787519619163, tenantId=1146029695717560320, journalId=1281212831689347082, language=CN, title=基于VISCO2.5D模型的苏门答腊地区地幔结构横向变化研究, columnId=1322566785874908034, journalTitle=大地测量与地球动力学, columnName=特色栏目: 地震大地测量学, runingTitle=null, highlight=null, articleAbstract=
基于二维黏弹性球形地球模型, 利用GRACE卫星的RL06观测数据和VISCO2.5D程序, 对苏门答腊地区地幔黏滞性结构进行约束, 以揭示2004年苏门答腊MW9.3地震引起的同震和震后重力场时空变化特征, 分析重力变化信号中蕴含的地幔黏滞性构造的横向变化信息。首先通过滤波与平滑等步骤处理GRACE卫星重力观测数据, 分离出2004年苏门答腊MW9.3地震伴随的同震与震后重力变化信号。该信号从西南向东北方向呈现负-正-负(印度洋-苏门答腊-马来西亚)的分布态势。在2005—2012年观测期内, 震后重力变化与同震重力变化量级相近, 最大负重力变化达-3.7 μGal, 最大正重力变化为8.3 μGal。在考虑海沟俯冲板块影响的前提下, 采用二维黏弹性地球模型, 运用VISCO2.5D谱元法, 对观测到的大尺度同震与震后重力变化进行模拟。结果发现, 当发震断层洋陆两侧地幔黏滞性系数分别取2×1019 Pa·s和1×1019 Pa·s、海沟附近存在下插板片、岩石圈弹性层厚度为60 km时, 模拟得到的震后重力变化与GRACE观测结果高度吻合, 表明苏门答腊地区震后重力变化主要由地幔黏弹性松弛效应引起, 余震效应引起的重力变化很小。
, authors=张昊洋
1, 2, 付广裕
1, 2, *, 刘泰
3, authorsList=张昊洋, 付广裕, 刘泰, authorCompany=null, correspAuthors=付广裕, authorNote=
, correspAuthorsNote=
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版权所有,未经授权,不得转载。, copyrightOwner=大地测量与地球动力学编辑部, extLink=null, articleAbsUrl=null, sourceXml=pbHVcpW4CdFRFVZOexOppg==, magXml=BnN8QS5KiKBB5IzKcd75qw==, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=tbKKKnEnwLR4+8JX+ZWhCQ==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=mwIgLzlm1iaRVgwh4/r4Xg==, mapNumber=null, fund=null)}, authors=[Author(id=1322916795371356289, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=filies0437@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1322916795509768324, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, authorId=1322916795371356289, language=EN, stringName=Haoyang ZHANG, firstName=Haoyang, middleName=null, lastName=ZHANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=1 Key Laboratory of Intraplate Volcanoes and Earthquakes (China University of Geosciences), Ministry of Education, Beijing 100083, China
2 School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1322916795706900614, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, authorId=1322916795371356289, language=CN, stringName=张昊洋, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=1 陆内火山与地震教育部重点实验室(中国地质大学(北京)), 北京, 100083
2 中国地质大学(北京)地球物理与信息技术学院, 北京, 100083, bio={"content":"
张昊洋, 硕士生, 主要从事地震形变研究, E-mail: filies0437@163.com
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1, 2, *, address=1 陆内火山与地震教育部重点实验室(中国地质大学(北京)), 北京, 100083
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Study area, figureFileSmall=8O97BZ5btbB94m7T2XIrcg==, figureFileBig=tbKKKnEnwLR4+8JX+ZWhCQ==, tableContent=null), ArticleFig(id=1322916797724360864, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图1, caption=
研究区域 红色虚线为剖面模型在地表的投影;彩色部分为苏门答腊MW9.3地震同震断层滑动模型,数据来源于Chlieh等[3]
, figureFileSmall=8O97BZ5btbB94m7T2XIrcg==, figureFileBig=tbKKKnEnwLR4+8JX+ZWhCQ==, tableContent=null), ArticleFig(id=1322916797988602018, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=EN, label=Fig. 2, caption=
Global spatial distribution of gravity changes in 2004-12, figureFileSmall=jxkcCimNfnpWVnAs8myn6Q==, figureFileBig=6/AqcVKVXg2GIeEdSz5RUA==, tableContent=null), ArticleFig(id=1322916798080876707, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图2, caption=
2004-12重力场变化全球分布, figureFileSmall=jxkcCimNfnpWVnAs8myn6Q==, figureFileBig=6/AqcVKVXg2GIeEdSz5RUA==, tableContent=null), ArticleFig(id=1322916798185734308, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=EN, label=Fig. 3, caption=
Co-seismic gravity change signals induced by the 2004 Sumatra MW9.3 earthquake observed by GRACE, figureFileSmall=YKeXWXl1J8sbgx333uuGjQ==, figureFileBig=LdFp/F15JFgG47em98kxRA==, tableContent=null), ArticleFig(id=1322916799913787557, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图3, caption=
GRACE观测到的2004年苏门答腊MW9.3地震引起的同震重力变化信号, figureFileSmall=YKeXWXl1J8sbgx333uuGjQ==, figureFileBig=LdFp/F15JFgG47em98kxRA==, tableContent=null), ArticleFig(id=1322916800014450855, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=EN, label=Fig. 4, caption=
The gravity changes at points A and B before and after the 2004 Sumatra MW9.3 earthquake observed by GRACE, figureFileSmall=Q47uQV69qtJ59KUUijacgQ==, figureFileBig=2zUDv69QdMlRdowNCtz/Ug==, tableContent=null), ArticleFig(id=1322916800115114152, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图4, caption=
GRACE观测到的2004年苏门答腊MW9.3地震前后A、B两点重力变化, figureFileSmall=Q47uQV69qtJ59KUUijacgQ==, figureFileBig=2zUDv69QdMlRdowNCtz/Ug==, tableContent=null), ArticleFig(id=1322916800207388841, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=EN, label=Fig. 5, caption=
The co-seismic and post-seismic gravity changes induced by the 2004 Sumatra MW9.3 earthquake observed by GRACE, figureFileSmall=4RtiJSvWTx893rpRVh70ZQ==, figureFileBig=kku1zi6tYb0iKEayGoOnPQ==, tableContent=null), ArticleFig(id=1322916800375161003, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图5, caption=
GRACE观测到的2004年苏门答腊MW9.3地震引起的震后重力变化, figureFileSmall=4RtiJSvWTx893rpRVh70ZQ==, figureFileBig=kku1zi6tYb0iKEayGoOnPQ==, tableContent=null), ArticleFig(id=1322916800475824300, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=EN, label=Fig. 6, caption=
Schematic diagram of the 2D viscoelastic model profile, figureFileSmall=zx4s+N5on6jgNorrYCoxoA==, figureFileBig=/AHus9OVY/GeDAr6WGOODA==, tableContent=null), ArticleFig(id=1322916800580681901, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图6, caption=
二维黏弹性模型剖面示意图, figureFileSmall=zx4s+N5on6jgNorrYCoxoA==, figureFileBig=/AHus9OVY/GeDAr6WGOODA==, tableContent=null), ArticleFig(id=1322916800727482542, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=EN, label=Fig. 7, caption=
Co-seismic gravity changes induced by the 2004 Sumatra MW9.3 earthquake calculated by VISCO2.5D, figureFileSmall=q7+AIcBESGwYKSK+d0rZUw==, figureFileBig=tNl1Me51XE+l4fC4FfhlyA==, tableContent=null), ArticleFig(id=1322916800878477487, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图7, caption=
VISCO2.5D计算的2004年苏门答腊MW9.3地震引起的同震重力变化, figureFileSmall=q7+AIcBESGwYKSK+d0rZUw==, figureFileBig=tNl1Me51XE+l4fC4FfhlyA==, tableContent=null), ArticleFig(id=1322916800970752176, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=EN, label=Fig. 8, caption=
The spatiotemporal evolution of post-seismic gravity changes induced by the 2004 Sumatra MW9.3 earthquake calculated by VISCO2.5D, figureFileSmall=nEEraMdnbZuEFAvcJcLwqw==, figureFileBig=M4O5i3wx522hJAsR7vwQfQ==, tableContent=null), ArticleFig(id=1322916801075609777, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图8, caption=
VISCO2.5D计算的2004年苏门答腊MW9.3地震引起的震后重力变化时空演化过程, figureFileSmall=nEEraMdnbZuEFAvcJcLwqw==, figureFileBig=M4O5i3wx522hJAsR7vwQfQ==, tableContent=null), ArticleFig(id=1322916801205633202, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=EN, label=Fig. 9, caption=
Post-seismic gravity changes of the 2004 Sumatra MW9.3 earthquake calculated by VISCO2.5D, figureFileSmall=EEmdmmWhZ7rbJvABp36CWQ==, figureFileBig=YlqbPnWgFg5+4GRsSiAToQ==, tableContent=null), ArticleFig(id=1322916801323073716, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图9, caption=
利用VISCO2.5D计算的2004年苏门答腊MW9.3地震震后重力变化 蓝色虚线表示GRACE的观测数据的指数对数拟合
, figureFileSmall=EEmdmmWhZ7rbJvABp36CWQ==, figureFileBig=YlqbPnWgFg5+4GRsSiAToQ==, tableContent=null), ArticleFig(id=1322916801419542709, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=EN, label=Fig. 10, caption=
Comparison between the profile (Fig. 1) gravity variations observed by GRACE in the Sumatran region during the 3 to 6 years after the earthquake and the results from VISCO2.5D simulation calculations, figureFileSmall=OaM6vI30T3/czws/gAQqlg==, figureFileBig=KSdleTGU8h7bR1iVQorRmQ==, tableContent=null), ArticleFig(id=1322916801562149046, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图10, caption=
震后3~6 a苏门答腊地区GRACE观测的剖面(图 1)重力变化与VISCO2.5D模拟计算的结果对比, figureFileSmall=OaM6vI30T3/czws/gAQqlg==, figureFileBig=KSdleTGU8h7bR1iVQorRmQ==, tableContent=null), ArticleFig(id=1322916801662812344, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=EN, label=Fig. 11, caption=
Comparison of gravity variations from GRACE-observed profiles (Fig. 1) in the Sumatran region after the earthquake with the results of VISCO2.5D simulation calculations, figureFileSmall=gZKHf7R62PtkI2n+V0gSfQ==, figureFileBig=vSXcdaiCPtflaGFwXqZ2NQ==, tableContent=null), ArticleFig(id=1322916801830584505, tenantId=1146029695717560320, journalId=1281212831689347082, articleId=1322916787519619163, language=CN, label=图11, caption=
苏门答腊地区震后GRACE观测的剖面(图 1)重力变化与VISCO2.5D模拟计算的结果对比 Dslab表示板块下切的深度;Dcrust表示弹性层的厚度;红色实线表示GRACE观测结果
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