DOI: 10.1016/j.jag.2017.10.005
Scopus记录号: 2-s2.0-85036499423
论文题名: Sequential combination of multi-source satellite observations for separation of surface deformation associated with serial seismic events
作者: Chen Q ; , Xu Q ; , Zhang Y ; , Yang Y ; , Yong Q ; , Liu G ; , Liu X
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2018
卷: 65 起始页码: 57
结束页码: 70
语种: 英语
英文关键词: Deformation discrimination
; Earthquake source model
; Satellite observations
; Sequential combination
; Tohoku-Oki earthquake
Scopus关键词: aftershock
; ALOS
; deformation mechanism
; earthquake event
; Envisat
; geodesy
; GPS
; interferometry
; PALSAR
; satellite data
; satellite imagery
; synthetic aperture radar
; Tohoku earthquake 2011
英文摘要: Single satellite geodetic technique has weakness for mapping sequence of ground deformation associated with serial seismic events, like InSAR with long revisiting period readily leading to mixed complex deformation signals from multiple events. It challenges the observation capability of single satellite geodetic technique for accurate recognition of individual surface deformation and earthquake model. The rapidly increasing availability of various satellite observations provides good solution for overcoming the issue. In this study, we explore a sequential combination of multiple overlapping datasets from ALOS/PALSAR, ENVISAT/ASAR and GPS observations to separate surface deformation associated with the 2011 Mw 9.0 Tohoku-Oki major quake and two strong aftershocks including the Mw 6.6 Iwaki and Mw 5.8 Ibaraki events. We first estimate the fault slip model of major shock with ASAR interferometry and GPS displacements as constraints. Due to the used PALSAR interferogram spanning the period of all the events, we then remove the surface deformation of major shock through forward calculated prediction thus obtaining PALSAR InSAR deformation associated with the two strong aftershocks. The inversion for source parameters of Iwaki aftershock is conducted using the refined PALSAR deformation considering that the higher magnitude Iwaki quake has dominant deformation contribution than the Ibaraki event. After removal of deformation component of Iwaki event, we determine the fault slip distribution of Ibaraki shock using the remained PALSAR InSAR deformation. Finally, the complete source models for the serial seismic events are clearly identified from the sequential combination of multi-source satellite observations, which suggest that the major quake is a predominant mega-thrust rupture, whereas the two aftershocks are normal faulting motion. The estimated seismic moment magnitude for the Tohoku-Oki, Iwaki and Ibaraki evens are Mw 9.0, Mw 6.85 and Mw 6.11, respectively. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79921
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Remote Sensing and Geoinformation Engineering, Southwest Jiaotong University, Chengdu, China; School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu, China
Recommended Citation:
Chen Q,, Xu Q,, Zhang Y,et al. Sequential combination of multi-source satellite observations for separation of surface deformation associated with serial seismic events[J]. International Journal of Applied Earth Observation and Geoinformation,2018-01-01,65