GNSS preseismic signal metrics and analysis scripts for large Sumatra–Sunda megathrust earthquakes

This dataset contains processed GNSS-derived preseismic signal metrics, event-level summaries, station classifications, epicentral distance calculations, and Python scripts used to analyze candidate vertical preseismic deformation signals before three large Sumatra–Sunda megathrust earthquakes: the 2005 Nias, 2007 Bengkulu, and 2010 Mentawai events. Candidate preseismic signals were identified using a vertical signal-to-noise ratio threshold (|SNR| > 1.5) within a 90-day pre-event window. The repository also includes figures used in the manuscript submitted to Earth and Planetary Science Letters.