期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2013
卷号：XL-1/W3
页码：377-381
DOI：10.5194/isprsarchives-XL-1-W3-377-2013
出版社：Copernicus Publications
摘要：In this paper, we study the gravitational gradient changes induced 11 March 2011 Mw 9.0 Tohoku-Oki earthquake using data gathered by Gravity Recovery and Climate Experiment (GRACE) satellite. Previous studies have demonstrated the capability of GRACE data for observing the coseismic gravity change concerning the Tohoku earthquake. However, we show for the first time that changes of the coseismic and postseismic gravitational gradient components are detectable without doing any post-processing and filtering. It can be seen that the derivative of gravitational potential amplify the high-frequency components of the earth gravity field. Therefore, gravitational gradient changes delineate more clearly the rupture lines and reveal refined mass redistribution features caused by the studied earthquake.
