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- W4387151569 abstract "Summary Postseismic gravity change modelling is commonly based on Earth model with Newtonian linear rheology. Here, we present a novel way of modelling postseismic gravity change by using a non-linear power-law rheology Earth model. The method is constructed based on the framework of Spectral Finite Element Method (SFEM). SFEM has been proven practical for the purpose of modeling gravity change occurring during megathrust earthquakes. Our method implements the strain rate expression of non-linear power-law rheology into the mathematical framework of SFEM. Using our method, simulations of geoid change caused by synthetic point source earthquakes were made. The results revealed the potential of using non-linear power-law rheology for the explanation of rapid gravity changes in the beginning of the postseismic epoch. Further on, we computed the postseismic gravity change of the 2011 M9.0 Tohoku-Oki earthquake based on Maxwell non-linear power-law rheology in the upper mantle. It demonstrated the potential of power-law upper mantle flow as a possible candidate for the explanation of postseismic gravity change after the earthquake occurs. However, a Maxwell non-linear power-law rheology alone is insufficient for the explanation of the postseismic gravity change occured." @default.
- W4387151569 created "2023-09-29" @default.
- W4387151569 creator A5035615173 @default.
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- W4387151569 date "2023-09-28" @default.
- W4387151569 modified "2023-09-30" @default.
- W4387151569 title "Postseismic gravity change modelling based on non-linear power-law upper mantle rheology" @default.
- W4387151569 doi "https://doi.org/10.1093/gji/ggad381" @default.
- W4387151569 hasPublicationYear "2023" @default.
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