Fig. 2

Displacement and precipitation time series. (a) Downslope displacement time series (see Methods) from InSAR (Sentinel-1 descending track 42) 800 days prior to catastrophic failure. (b) Horizontal displacement time series from PlanetScope pixel tracking ~ 275 days prior to catastrophic failure. InSAR data from (a) are also plotted on (b) within the magenta box. (a,b) Thick lines show the median value for the catastrophic failure area, the slow-moving area, and a not-moving area off the landslide. Error bars in (b) show standard deviation. Shaded region shows the full range of values measured for each landslide area (see inset maps). (c,d) Precipitation rate and cumulative precipitation time series. Note the large difference in magnitude between the displacement measured from InSAR and PlanetScope in the catastrophic failure area, likely caused by severe phase aliasing problems in the last 100 days before failure (see text for discussion). InSAR data were previously published in Ref.⁵⁹.