Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W3, 377-381, 2013
https://doi.org/10.5194/isprsarchives-XL-1-W3-377-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
24 Sep 2013
COSEISMIC AND POSEISMIC GRAVITY CHANGES OBTAINED FROM GRACE SATELLITE DATA DURING THE POWERFUL TOHOKU-OKI EARTHQUAKE OF 11 MARCH 2011
M. Akhoondzadeh1, M. A. Sharifi2, and M. Shahrisvand1 1Remote sensing division, Department of Surveying and Geomatic Engineering, College of Engineering, University of Tehran, Iran
2Geodesy division, , Department of Surveying and Geomatic Engineering, College of Engineering, University of Tehran, Iran
Keywords: Gravity, Earthquake, GRACE Abstract. 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.
Conference paper (PDF, 631 KB)


Citation: Akhoondzadeh, M., Sharifi, M. A., and Shahrisvand, M.: COSEISMIC AND POSEISMIC GRAVITY CHANGES OBTAINED FROM GRACE SATELLITE DATA DURING THE POWERFUL TOHOKU-OKI EARTHQUAKE OF 11 MARCH 2011, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W3, 377-381, https://doi.org/10.5194/isprsarchives-XL-1-W3-377-2013, 2013.

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