DOI: 10.1002/2013GL059178
论文题名: Improved constraints on seismic source parameters of the 2011 Tohoku earthquake from GRACE gravity and gravity gradient changes
作者: Dai C. ; Shum C.K. ; Wang R. ; Wang L. ; Guo J. ; Shang K. ; Tapley B.
刊名: Geophysical Research Letters
ISSN: 0094-10251
EISSN: 1944-9982
出版年: 2014
卷: 41, 期: 6 起始页码: 1929
结束页码: 1936
语种: 英语
英文关键词: 2011 Tohoku Earthquake
; GRACE
; gravity gradient
; megathrust faults
; north component of gravity
Scopus关键词: Climate change
; Faulting
; Spectrum analysis
; 2011 tohoku earthquakes
; GRACE
; Gravity gradients
; Gravity recovery and climate experiment datum
; Megathrust
; Seismic deformation
; Simulated annealing algorithms
; Spherical harmonics
; Earthquakes
; algorithm
; data set
; deformation
; GPS
; GRACE
; gravity field
; seismic source
; slip
; spatial resolution
; Tohoku earthquake 2011
英文摘要: A new approach of using only the north component of gravity change from Gravity Recovery and Climate Experiment (GRACE) data reveals that a substantially higher spatial resolution of the observed seismic deformation following the 2011 Tohoku earthquake is achievable at 333 km or longer. Here we show that GRACE-observed north component of gravity change, -17.6 ± 1.1 μGal, and the corresponding gravity gradient change, e.g., Txz at 1.25 ± 0.09 mEötvös, agree well with seismic/GPS model predictions. Localized Slepian spectrum analysis further confirms that the GRACE gravity and gravity gradient changes agree well with seismic model spectra and have powers up to the limit of the GRACE solution complete to spherical harmonic degree 60. Using the gravity observations for the fault parameter inversion via simulated annealing algorithm, we show that the estimated slip orientation and centroid location are different from GPS/seismic solutions and potentially due to the additional offshore constraint from GRACE data. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896415759&doi=10.1002%2f2013GL059178&partnerID=40&md5=02d36e7e48bda6a825d624092048e3bd
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7515
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Division of Geodetic Science, School of Earth Sciences, Ohio State University, Columbus, OH, United States
Recommended Citation:
Dai C.,Shum C.K.,Wang R.,et al. Improved constraints on seismic source parameters of the 2011 Tohoku earthquake from GRACE gravity and gravity gradient changes[J]. Geophysical Research Letters,2014-01-01,41(6).