Stamps, D.S., et al., 2020, Redefining East African Rift System kinematics: Geology, v. 49, https://doi.org/10.1130/G47985.1 This readme file describes the contents of the supplementary file final_model_txt.zip (G47985_SuppData1.zip). This supplementary file includes the input file and all necessary model and data files needed to reproduce the results presented in this manuscript. To abide by Geology standards, all files have the additional file extension .txt. Before running the model files with TDEFNODE, remove .txt from the end of each ascii file. The files provided within final_model_txt.zip with the file extension .txt removed are listed below with descriptions: final.tdfn: The input file needed to run TDEFNODE and reproduce the results presented in this manuscript. TDEFNODE is available open-access here http://www.web.pdx.edu/~mccaf/defnode.html final_anta.block: Defines the longitude and latitude values needed to outline the portion of the Antarctica plate used in the kinematic model in the format required for TDEFNODE. final_lwan.block: Defines the longitude and latitude values needed to outline the entire Lwandle microplate newly defined in the kinematic model in the format required for TDEFNODE. final_nubi.block: Defines the longitude and latitude values needed to outline the portion of the Nubian plate used in the kinematic model in the format required for TDEFNODE. final_rovu.block: Defines the longitude and latitude values needed to outline the entire Rovuma microplate used in the kinematic model in the format required for TDEFNODE. final_soma.block: Defines the longitude and latitude values needed to outline the portion of the Somalian plate used in the kinematic model in the format required for TDEFNODE. final_vict.block: Defines the longitude and latitude values needed to outline the entire Victoria microplate used in the kinematic model in the format required for TDEFNODE. final_lwan.psvelo: The GPS velocity file for sites on the Lwandle microplate in the format required for TDEFNODE. final_soma.psvelo: The GPS velocity file for the sites on the Somalian plate in the format required for TDEFNODE final_spreading_rates.dat: Spreading rate data along the southern Lwandle microplate boundary for the Southwest Indian Spreading Ridge in the format required for TDEFNODE. final_transform_azimuths.dat: Transform azimuth data along the southern Lwandle microplate boundary for the Southwest Indian Spreading Ridge in the format required for TDEFNODE.