Investigation of the Co-seismic Gravity FieldVariations Caused by the 2004 Sumatra-Andaman Earthquake Using Monthly GRACE Data
- Received Date: 2017-03-21
- Accepted Date: 2017-03-21
- Available Online: 2017-03-21
Abstract: Gravity Recovery and Climate Experiment (GRACE) observations have been used to detect the co-seismic and post-seismic gravity field variations due to the Mw=9.3 Sumatra-Andaman earthquake that occurred on December 26, 2004. This article focuses on investigating some gravitational effects caused by this huge earthquake. We computed the geoid height changes, the equivalent water height (EWH) changes, and the gravity changes using the GRACE Level-2 monthly spherical harmonic (SH) solutions released by University of Texas Center for Space Research (UTCSR). The GRACE results agree well with the prediction by a dislocation model and are consistent with the results obtained by some previous scholars...