利用远场和近场GPS数据联合反演2011日本东北大地震(Mw 9.0)断层滑动模型（英文）
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- 论文作者：杨君妍 ; 易爽 ; 孙文科
- 年：2016
- 作者机构：中国科学院大学;
- 会议召开时间：2016-10-15
- 会议录名称：2016中国地球科学联合学术年会论文集（三十一）——专题55：空间大地测量与地壳动力学、专题56：空间大地测量的全球变化研究、专题57：地震大地测量学
- 英文会议录名称：Proceedings of 2016 Annual Meeting of Chinese Geoscience Union(CGU)
- 语种：英文
- 分类号：P315.7
- 学会代码：ZGDW
- 会议名称：2016中国地球科学联合学术年会
- 会议地点：中国北京
- 主办单位：中国地球物理学会、中国地震学会、全国岩石学与地球动力学研讨会组委会、中国地质学会构造地质学与地球动力学专业委员会、中国地质学会区域地质与成矿专业委员会
- 学会名称：中国地球物理学会
- 页数：3
- 文件大小：1702k
- 原文格式：D
- 会议级别：全国
摘要
Signification displacements caused by the 2011 Tohoku-Oki earthquake(Mw9.0)can be detected by GPS observations on the north and northeast of Asian continent which comes from Crustal Movement Observation Network of China(CMONOC).Obviously horizontal displacement which can be detected with many GPS stations reaches to almost 3cm and 2cm and most of those extend eastward pointing to the epicenter of this earthquake.Those data can be acquired rapidly after the earthquake from CMONOC.Here,we will discuss how to calculate the seismic moment with those far-field GPS observations.The far field displacement can constrain the pattern of finite slip model and seismic moment using spherically stratified Earth model(PREM).In the research we also compare the different between point source and finite fault on the direction and the magnitude of the displacement with the dislocation theory.Using computations and comparisons,we discuss horizontal displacement calculating with low degrees and whole frequency.This study shows that far field GPS data can constrain the slip pattern of the 2011 Tohoku-Oki earthquake(Mw9.0)and give a reference for other research to study seismic source rupture.The low degree more n=15 is equal to the hull spectrum when the distance is away from the epicenter about 3000km.
Signification displacements caused by the 2011 Tohoku-Oki earthquake(Mw9.0) can be detected by GPS observations on the north and northeast of Asian continent which comes from Crustal Movement Observation Network of China(CMONOC). Obviously horizontal displacement which can be detected with many GPS stations reaches to almost 3cm and 2cm and most of those extend eastward pointing to the epicenter of this earthquake. Those data can be acquired rapidly after the earthquake from CMONOC. Here, we will discuss how to calculate the seismic moment with those far-field GPS observations. The far field displacement can constrain the pattern of finite slip model and seismic moment using spherically stratified Earth model(PREM). In the research we also compare the different between point source and finite fault on the direction and the magnitude of the displacement with the dislocation theory. Using computations and comparisons, we discuss horizontal displacement calculating with low degrees and whole frequency. This study shows that far field GPS data can constrain the slip pattern of the 2011 Tohoku-Oki earthquake(Mw9.0) and give a reference for other research to study seismic source rupture. The low degree more n=15 is equal to the hull spectrum when the distance is away from the epicenter about 3000 km.
Signification displacements caused by the 2011 Tohoku-Oki earthquake(Mw9.0) can be detected by GPS observations on the north and northeast of Asian continent which comes from Crustal Movement Observation Network of China(CMONOC). Obviously horizontal displacement which can be detected with many GPS stations reaches to almost 3cm and 2cm and most of those extend eastward pointing to the epicenter of this earthquake. Those data can be acquired rapidly after the earthquake from CMONOC. Here, we will discuss how to calculate the seismic moment with those far-field GPS observations. The far field displacement can constrain the pattern of finite slip model and seismic moment using spherically stratified Earth model(PREM). In the research we also compare the different between point source and finite fault on the direction and the magnitude of the displacement with the dislocation theory. Using computations and comparisons, we discuss horizontal displacement calculating with low degrees and whole frequency. This study shows that far field GPS data can constrain the slip pattern of the 2011 Tohoku-Oki earthquake(Mw9.0) and give a reference for other research to study seismic source rupture. The low degree more n=15 is equal to the hull spectrum when the distance is away from the epicenter about 3000 km.
引文
Wei S,Sladen A.the Aria Group(2011).Updated Result:3/11/2011(Mw 9.0),Tohoku-oki,Japan[J].2012.
Sun,W.and S.Okubo,Surface potential and gravity changes due to internal dislocations in a spherical earth-I.Theory for a point dislocation,Geophys.J.Int.,114,569-592,1993.
Sun,W.and S.Okubo,Surface potential and gravity changes due to internal dislocations in a spherical earth-I.Theory for a point dislocation,Geophys.J.Int.,114,569-592,1993.