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Since 2002,the GRACE program has provided a large amount of high-precision data,which can be used to detect temporal gravity variations related to global mass re-distribution inside the fluid envelop of the surface of the Earth.In order to make use of the GRACE data to investigate earthquake-related gravity changes in China,we first studied the degree variances of the monthly GRACE gravity field models,and then applied decorrelation and Gaussian smoothing method to obtain seasonal gravity changes in China.By deducting the multi-year mean seasonal variations from the seasonal maps,we found some earthquake-related gravity anomalies.
Since 2002, the GRACE program has provided a large amount of high-precision data, which can be used to detect temporal gravity variations related to global mass re-distribution inside the fluid envelop of the surface of the Earth. In order to make use of the GRACE data to investigate earthquake-related gravity changes in China, we first studied the degree variances of the monthly GRACE gravity field models, and then applied decorrelation and Gaussian smoothing method to obtain seasonal gravity changes in China. By deducting the multi-year mean seasonal variations from the seasonal maps, we found some earthquake-related gravity anomalies