Abstract
This dataset includes all input files used to conduct the postseismic viscoelastic modelling in the article: Ng, G., Feng, L., Zhou, X., Luo, H., Wang, K., Sun, T., Yong, C. Z., & Hill, E. M. (2026). Weak asthenosphere of Sumatran backarc revealed by long postseismic geodetic records. Communications Earth & Environment. https://doi.org/10.1038/s43247-026-03561-5.