[1]LI Jing,WAN Xiaoyun,XU Ming.Comparative Analysis of the Coseismic Gravity Gradient Signals of the 2007 Bengkulu,Indonesia MW8.4 Earthquake Based on GRACE Satellite Data and the Dislocation Model[J].Journal of Seismological Research,2023,46(04):521-528.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0031 ]
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Comparative Analysis of the Coseismic Gravity Gradient Signals of the 2007 Bengkulu,Indonesia MW8.4 Earthquake Based on GRACE Satellite Data and the Dislocation Model

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 46 Number of periods: 2023 04 Page number: 521-528 Column: Public date: 2023-07-15
Title:
Comparative Analysis of the Coseismic Gravity Gradient Signals of the 2007 Bengkulu,Indonesia MW8.4 Earthquake Based on GRACE Satellite Data and the Dislocation Model
Author(s):
LI Jing1; WAN Xiaoyun1; XU Ming1; 2
(1.School of Land Science and Technology,China University of Geosciences(Beijing),Beijing 100083,China)(2.National Engineering Research Center for Gas Hydrate Exploration and Development,Guangzhou Marine Geological Survey,Guangzhou 511466,Guangdong,China)
Keywords:
GRACE;  the dislocation model;  gravity gradient;  the Bengkulu; Indonesia MW8.4 earthquake
CLC:
P315.726
DOI:
10.20015/j.cnki.ISSN1000-0666.2023.0031
Abstract:
To assess the feasibility of the time-variable gravity field data provided by GRACE satellite in detection of the coseismic gravity gradient changes,the gravity gradient changes in 12 months before and after the 2007 Bengkulu,Indonesia MW8.4 earthquake in the epicenter and its vicinity are calculated by GRACE satellite data.The theoretical values of coseismic gravity gradient changes are calculated by the forward of the dislocation model,and then compared with the GRACE results.At the level of the order of magnitude,the GRACE results are consistent with the results from the forward of the dislocation model,though the specific values are a little different.Correlation analysis shows that the closer to the epicenter,the higher the correlation of the gradient values obtained by the two methods are,and the correlation in the epicentral area are over 90%.
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